This ought to do the trick:

<!-- This is the escort NPC that must be brought to the target goodie hut -->

<GameModifier InternalName="EscortNPC">

<ModType>Unit</ModType>

<Attribute>UnitJoinArmy</Attribute>

<StrVal>EscortSon01</StrVal>

<UnitClass>Unit</UnitClass>

</GameModifier>

This will let you choose the person = <StrVal>EscortSon01</StrVal>

I think <UnitClass> determines what kind of unit you receive, such as unit, hero, sov, creature. I am guessing of course.

<Attribute>UnitJoinArmy</Attribute> This will both create said unit and add him or her to your faction.

<ModType>Unit</ModType> This tells the it what to spawn? I am not really sure.

I also want to make goodiehuts that function as lairs that spawn monsters from time to time, I assume the xml to do this would be the same as what I am trying to achieve with my quest.  This must be possible because I remember this was happening in one of the beta versions. 

Doh, I should have thought of looking at the summoning examples, thanks! I'll try this later tonight.

Starting to get excited about the quest modding capabilities, could make whole little mini-campaigns with enough time and effort.

Darn, it seems that the SummonUnit atribute only summons the unit as a member of your own faction, and only on the tile where the objective is located. So the radius option isn't functional for that attribute.

This is very frustrating since a very simple XML schema for the quest-related xml files would save hours of blind poking around.

Well after a few more hours I can't find any way to do what I wanted ;(  

Tried the gamemodifier tag, the summon tag, encounter, etc. Can't find any example of, or documented, way to have a quest objective spawn a wandering monster.

I can spawn goodiehuts using gamemodifier, I can spawn a friendly unit residing in the same tile using the summon element, and I can spawn a enemy unit that I fight on the tactical map using the encounter element, but if there is a way to spawn a wandering monster then it must be undocumented and/or no example of it in the base game xml files. This is a bummer because I wanted to create quests the unleash enemy monsters if you avoid or fail in the tasks given. I bet there is a way to do it, but without knowing all the available attributes I can't do it without days of guess work.  

Bobby

Would that be used within the summon attribute? Not sure about the context for those xml tags Sean.

I'm hoping Frogboy's quest mod dev forum posts will answer my questions. 

I think that just results in an encounter being created, where the player is taken to the tactical map and fights that group of brigands. Then if the brigands win they stay on the map and will wonder within the wandering radius. What I want to do is spawn the units onto the map without the tactical battle encounter happening. It's probably something simple that I am missing.

I'll check that out tonight, thanks! I guess I should have looked harder at some of those base game quests.  If I can do this then it makes a whole class of quests possible, where monsters get unleashed if you fail the quest objectives or make the wrong choice. You could then link these together into whole little mini-campaigns. 

Yep, I've already created quests that spawn tactical battle encounters. And I had the thought that by creating a custom tactical map, you could have a dungeon. Bam. Of course right now theres no art assets for that so it would be a huge task. Plus, creating monsters and treasure and triggers inside the custom tactical map would be a daunting task - you could proably do it by having quests nested inside tactical map, and wandering monsters in there, etc, if thats even possible right now in the xml?

  Ultimately, it should be possible to create entire complex ultima-style dungeons.

The way they handled it, is through adding the unit as part of the goodie hut, which contains the second wolf encounter.

Looking at it carefully I think I am right this creates two things the location and the wandering / stategic map pack of wolves they have a wnadering Radius of 0 though so they stay in that location.  The Location then triggers another battle with another group of woves based on it's own trigger which is in Quest_Part_2_TheWolfBattle.

Well I tried all the ideas suggested in this thread and nothing seems to work. The encounter tag only produces tactical battles, it doesn't result in spawning a unit on the map. (unless that unit wins the encounter, then it remains on the map)

I can get it to spawn a goodiehut that has an icon that looks like a unit, and then have that goodiehut create an encounter if you move on it. But that goodiehut itself can't move, so its just simulating a unit that is frozen in place.

Also tried different things with the summon attribute, gamemodifier, etc, and nothing seems to do it. 

This is intensely frustrating, it must be possible but I just cannot get the xml to do it yet. Starting to wonder if maybe its just not possible? 

I tried what you are saying, using the modtype of 'map' and then the 'summonunit' attribute, couldn't get it to work at all. Its probably just some syntax I am screwing up or something, I wish Frogboy would post an example of this being done.