I think you'll find that the Trail Lite 225 and 235S both solve your problems with a dry bath and shower and a passenger side exit door. Both are available with Chevy or Ford chassis. The Ford has the V-10 engine.
I traded up from a 99 StarFlyte in February for the 235S specifically for the slide and for the dry bath. If you read the posts you'll find Dario went for the 225. Obviously we thought it was worth the trade. For me a few electrical kinks had to be worked out, but for the last two trips this month it's been humming along.