You're right – it's not super ideal, but for us the benefit of more counter space outweighs the inconvenience of reaching under. If it ends up being a huge pain in the ass, we'll just shorten the counter later.
Behind the bed / shower is our garage area. We'll be traveling with a lot of outdoor gear – mountain bikes, climbing stuff, skis, etc., and we want to be able to keep it organized and separate from the rest of the living area. We have a big emergency exit back there so getting in and out shouldn't be too much of a hassle!
Not sure I follow re: corner cabinets. We organized the kitchen this way so that both of us could work in the kitchen at the same time – I will be able to access the prep area and stove while Will washes dishes simultaneously. Moving the sink to the straight counter would mess up that flow and increasing the depth on the straight counter would decrease the amount of space we have for a diagonal sink... It's like a game of compromise tetris! Luckily we have a pretty large cupboard area right between the bathroom and the kitchen so I think we'll be able to recoup some of our storage there.
On another note – it seems like you have some serious plumbing expertise! I'm trying to order my tanks right now (thinking two of these
for fresh / gray, don't need a black) and I'm having quite a time figuring out what fittings to attach, and where they should go. They'll be mounted underneath the bus, right under the kitchen and bathroom. Any thoughts? Thanks in advance!