Coleman has some models with bunks and a full tub like the Coleman 244BH. Coleman is a decent entry level TT, and is usually sold by Camping World. When you look at Coleman floor plans, it will say Tub or Shower, the later being a low sided shower pan. Looks like this one has a full queen - but check to be sure it's not just a "short queen".
We used the tub for our youngest the first few times out - filled at least halfway with hot water - don't remember having issues with not enough hot water - just turned on gas and electric.
Anyway, that got old fast as I was always going to the dump station with the tote to empty the gray water. After that, we just sat him in the tub and used the shower wand.
