It sounds like what you need most is a Tahoe or a Suburban. You could find the newest one you like, buy it, give it an actual try and see if it does everything just the way you need it to. If not, sell it and try something else.
I’m the oldest of 5 and grew up with a dad who raced all over the country. We traveled all 7 us a couple thousand miles a weekend in some not ideal vehicles. The mental impact of being cramped for space for 12 hours at a time seems to have affected all 5 of us kids exactly the same. For many years us kids rode in the cab over camper on the back of a single cab Ford. Then dad switched to a single cab dodge with a camper shell and one of those carpeted camper shell kits. The best times traveling were when we had Econoline Vans.
Collectively we all look back on our childhoods fondly with the exception of our traveling accommodations. All 5 of us have in our driveways the vehicles now that we wish our parents had when we were kids and traveling a lot. I DD a 1 ton 7 passenger SUV (like a suburban but better). Little sis has an Eddie Bauer excursion. Brothers have crew cabs and SUV’s. We’ll all never get crammed together uncomfortably for hours on end again. And before the peanut gallery wants to jump my shit for complaining about being inconvenienced for a while. I’m not exaggerating when I say we have at least 200k miles of travel time riding in the bed the bed of a single cab truck. I did my time, fawk off.