Welcome to the Forum!
Does it exist? YES, ABSOLUTELY!!
I recently saw one with master BR and full bath up front, 2 room bunk house in back separated by shared ½ bath in between, with W/D hookups in the back. I'll try to find it again.
One great place to look is PPL.com. They sell consignment campers in Texas, buy their listings page includes a floor plan with every listing. They have LOTS of listings, so you can scroll through to find floor plans you like, record make and model, then look closer to home to find one.
I have been looking for a year (not quite time to buy - yet!) and many 35 ft FW have W/D hookups, which is all you really need in the camper. It is very hard to add hookups, but easy to add washer & dryer with hook ups present. There are Toy Hauler and "conventional" floor plans with a bunk house. The big issue with a bunkhouse is it condenses the kitchen and living area into a much smaller space.
The 35 ft FW will be easier to get into parks with, but I would not toss out a 36 or 37 ft that was perfect in every other way!