I will preface my post by saying that If you put your mind to it, you can make just about anything work. We are a family of 6, and have traveled all over Alaska in our beloved 1966 Avion 10ft camper on a 2002 F350 CCSB. My oldest two boys sleep on the seats in the cab of the truck... No modifications required. My 11 yo twins (B&G) sleep on the dinette. and mom and I in the cab over. We have traveled and camped in sub zero weather, wet weather, hot weather all over Alaska, and it is about a state of mind.
If you want it to work, it will work.:C
If you have any one person that decides they don't want to make it work, all will usually be made miserable by the one...:(
All 6 of us over the years have camped in everything from a 1978 22' Ideal TT, a 2001 Nomad 308 (30') TT, a 1992 Tioga 23' Class-C, a 1992 Dutchman 29' Class C, and now our Avion.
We have learned to be minimalists and we have learned to be close. We try to do lots out doors even when the weather does not cooperate. It is all an attitude.
We have frequently been called crazy by people that "stuff" a couple, and a yappy dog and a kid in a 40 ft Class A or Fiver, and complain about there not being enough room in their RV if they can not extend their three slides in the "substandard" Alaskan Campsite...
Again, it is all in your attitude. You can make "anything" work, if you want to make it work.
I hope this helps you in your search with such restrictive requirements. You are the only one that can make the choice, but if you are "sharing" with other families you have to ask yourself, "Are they going to be happy?" Or "We are going to be happy and make this work? It's all a state of mind.
Garry in Kodiak, Alaska