So, a Montero for wife/family camp outs, truck for utility/tow rig/ camping, and Sami for playing around in the hills...would not fit my needs at all?
Did you ever answer what type of wheeling you intend to do with the "third" vehicle? I'm not sure if I read it anywhere above. If you just want to mess around in the mountains and on some easier Moab trails, heck yeah. My bro had a Sami and while it was a blast it's really just not the right platform for anything serious given the amount of modifications it takes to make it "hardcore." That being said, I still fully intend to build a little buggy out of a Sami or Kick/Track one day
All I read in the first post is expedition type wheeling and the ability to fit the kids. That was where my suggestions were based from. I was thinking that you were trying to get down to 2 vehicles as well. Maybe you should clarify the type of wheeling (specific trails) then we can better advise you.
If you ever plan on taking your 3 children in a Sami with gear you will surely be challenged for anything beyond a day trip.