We have been looking at getting a 374th. It has a good spot for litter box near the kitchen, where the W/D would go. We will not be getting a W/D so it works for us.
We would put in a cat "door" like we have in our Brookstone 354ts. It had an excellent place to put a box without too much trouble, the closet in the hallway.
Wife must have her cat(s) with her so any trailer we look at, we look for a good place for the box.
2013 F350 6.7 DRW SC Lariat
2011 Brookstone 354TS
Swivelwheel 58DW
1993 GL1500SE
Yamaha 3000ISEB