DW and I are spending the summer in an older Fleetwood 29L, no slides. I have to admit I haven't measured it so I'm not sure if that's ball to bumper or carpeted floor. We did several weekends last year and never had any trouble getting spots or getting in and out.
Floor plan is really important to determining feels big or small to you. We love our layout. Rear walk around queen, walk through bath (we'd never get a camper without that) and front kitchen.
The downfall of our camper is not much closet space which seems to be a result of the walk through bath. Our daughter has an even older 32 footer. Same basic layout except tiny tiny bath and tons of closets.
I was thinking if the DW and I were camping every week/weekend I would be looking in the 32-34 foot range. Not ridiculous long but just a little more closet space and room to stretch out.