We are at the same stage in or search. Outside bathroom access seems a big deal, esp. at my age. We were thinking in terms of when parked for convenience and mud reduction, but while traveling, bathroom access would be a big plus indeed! I was considering a 2017 Hideout 31RBDS, which seems to have the best floor plan I've seen thus far, but we're still in the research stage, and a walkable roof is beginning to look like more of a must, given our plan to go northeast.
Best of success in your search!!
2016 Chevy 2500 HD LTZ Crew Cab 6.0
2019 Load Trail 10k payload dump trailer
Bunkhouse trailer to be added soon!