It is nice to have a big van. It is also not nice to have a big van. The good part is that you can stand up in it, camp in it, take road trips in it, and really enjoy using it. The bad part is it takes an hour to wash the dang thing! It is too big to fit into any of the automatic car washes, and those car washes where you use a high pressure hose to wash it yourself, well they don't do a good job for what you spend. I reckon if you stayed there and kept feeding it quarters, it would be great... but I'd rather do it at home for free. Plus I can be leisurely about it at home and not feel rushed because the hose it beeping at me wanting more quarters!
We have a long handle brush so we can reach all the way up to the top, and a ladder for when we want to wash the roof. We don't wash the roof but about once or twice a year as it is a chore. You have to balance on the ladder while scrubbing the roof while keeping the hose from falling to the ground.
We washed the van today (not the roof, though) and it is all nice and shiny again. We noticed we have a bunch of tiny chips in the paint on the front from stuff hitting the van while driving. Nothing you can really do about that unless you put a bra on there. Oh well, you take the good with bad and focus on the good and you'll have a much happier life.