Sorry I totally missed this post when you made it back in June. I was actually out car camping in Yellowstone and was off the grid and didn't catch back up when I returned home.
I have done A LOT of car camping in either my hubby's 2002 Pontiac Montana (which we no longer have) or my 2012 Hyundai Santa Fe, which I LOVE! That said, I too have recently retired and am looking at campervans moving forward. Mostly because my sister & I would like to pick up and go, and my hubby doesn't have a lot of interest. Car camping solo in the Santa Fe has been just fine. I've learned to make it comfortable and workable for just myself.
My sister & I did do just over 2 weeks in a brand new Winnebago Solis in May, driving from Iowa to Anchorage. While we liked the kitchen set up fine, we didn't feel the pop-up camper was conducive for two ladies in our 60's with gimpy knees. To her credit, my sister was a real trooper with it. We also chose to not use the water hook-ups and there for the shower. We also didn't want to deal with the canister toilet so the "bathroom" area was used mainly for storage on our trip.
Having car camped for over 10 years, my needs are not very fancy relative to what I'm looking at in a campervan . . . and as I posted today, an older Road Trek 190 Popular has my eye right now.
I did go take a look at these
Transit Mini T campervans in Minnesota just this past weekend. While I was very impressed with the thought process in their layout and the quality workmanship of the conversation build-out, they were simply too small for me to consider . . . even if I was camping solo (and I'm short . . . just 5'2). The oddest thing about these is that they do the couch/bed install on the passenger side of the van, so the entry is on the driver's side of the vehicle. Not a deal breaker, but weird. But the fact that stepping up into the van is a tall step, and for me, requiring a step stool, was a deal breaker. Also even at my short stature, I had to bend over just to climb in/over to the couch. For my 5'11 hubby, that would have been a hassle he's never stop complaining about.
Like others have said, as much as I do enjoy RV camping (which hubby & I have done in Alaska several times), the size of a motor home isn't very good when going to places I like going like Yellowstone and other US National Parks. Parking is a challenge, and we haven't and don't want to tow a vehicle behind for the exploring & touring of such places. I know lots of people who do vacation that way, and it works for them. We just don't have the money to buy vehicles that way, so a campervan is the way for me/us.