My buddies sprinter starts looking like it’s worth the price tag.... until you drive it
That's actually the route I took (on my 2nd, the Sprinter was a maintenance nightmare, the Ford Transit has been tons better). Full queen bed, plenty of room for Everything, drives fine... The Sprinter (130" wheelbase) was great in town, a little twitchy on the highway. The Transit is great on the highway, a bit of a bus in town.
You're not going crawling in one, but I haven't had any issues with USFS roads out in the Rockies (short of impassable due to snow). Really want to go all out, there's the Quigley 4x4 conversion.
wife had to do the requisite vanlife photo this summer in Montana:
I'm looking and not finding a photo of a transit going through a squeeze in Moab... plenty of guys in the Rockies that are taking them over the many passes and into places you just don't think they could get. Proper tires, some experience (and confidence in your recovery gear/people) goes a long way.
But, they are for different uses. Funny that my Ecoboost Transit gets better fuel economy than the 4runner though, with a Much bigger size, more weight and double the HP. Cripes, the Sprinter was closer to 30mpg than 20mpg. The van is a road warrior, it's nothing to go from GA to WA in a couple days with 2 people (one sleeps while the other drives). I have almost every convenience of home... no inside shower is about the limit. Well, space ~ you don't have a ton of space inside Any vehicle you're trying to sleep in. But having done the Jeep sleeping as a young 20-nothing, and then later doing the full-on truck-bed sleep platform ~ both of which were cramped and uncomfortable, then a normal "conversion" van which was actually worse (bed goes cross-wise, yeesh) ~ a full queen bed in a big van is a God-send for sleeping comfort. We've done 2 different 7-week long trips, and other than just wanting a good shower, it was doable for a lot longer.
I'll never even try to sleep in my 4runner. Not worth the pains/crappy nights sleep when I have something better. Similarly, if I want to get away, I'll tow my dirtbike with the van, use the bike to go explore and come back to the van to sleep. I understand making do with what's available, I had a lot of years of doing just that. Tall and a 4runner though, best bet will be a tent. Rooftop if you like having to climb up and down a ladder all the time (only takes one 2" heart-attack at 3am while going to pee... your lady companion isn't going to go in a bottle so her experiences/comforts count too... and you might not think so fondly on a RTT), or conventional if you want to Easily use the gear regardless of vehicle.