One ton passenger van is often overlooked as a good family TV.
3/4 ton Subs are a good choice too. For a GROWING family like yours I would have a 15 passenger van with the rear seat removed as a DD right now. That would give Everyone some room to stretch out some.
Most people don't go with a van because.. its a van..Thats pretty sad because they are AWESOME tow vehicles. Tons of room for people, gear, trailer, and get decent MPG for what they are.
Thanks and good luck..
PS... not sure I want 8 people in a tent trailer either. My 4 keeps my gray tank pretty full as it is now. I could only imagine a Tent Trailer.
Thanks!
Jeremiah