Our last bigish camper had a crawl thru behind the passenger seat meaning that seat would have to rotate to get at it. There was a sliding metal door for security and a flexy coupling joining cab with camper across about the 10" gap. Never used, too much hassle. But as mentioned above to park for the night would involve getting out, turning on the lpg, checking the oil, walking around finding the best view or flattest spot pretty much regardless of the weather.
And the air pressure would drop over a day or two so some engine running was needed to be able to drive off. Air parking brakes need pressure to release not engage.
You could get rid of every little leak on your air system but that won't stop someone cutting a line or something similar?
Our new biggish truck has a long crawl through which when it's finished might be where our boxer dog travels if he decides to use it. The cab end of it is open, the camper end has a flexy and the same type of door the rest of the camper has. It may get used but for the same reasons as before it probably won't. Heat, cold or dust from the cab won't be appreciated in the back so the door will be locked shut when we roll.
We have windows all around the dinette at the camper front because the cab is lower than the camper by enough to do that just.
If we had a walk through as Joe917 describes that would be very nice, and we've had a few van based campers with that level of openness, but even considering the few places we've parked that were not as safe as they could have been I still don't think one is essential?
And the flexy bit is irrelevant, just a door on each side is perhaps all that's needed unless you want it open to the back all the time? Just how frequently do you need a fresh coffee passed to you?
Putting a box on a truck doesn't need to be $400000 surely?
