I'm single (if you don't count a 2-month old, yet-to-be-named kitten), drive a 38+' Fleetwood Bounder, and would feel crowded in anything less than a 34'. Mine doesn't have a slide either, but it's an ultra(extra?)wide 102" and plenty spacious without the slide, but one for the LR would be nice.
You quickly adapt to driving a large vehicle, but it does require some extra caution over that of a car, especially when you have several feet of MH hanging out over the rear axle. Difference between driving a 30-34' vs. a 36-40'? Probably not much.
Last weekend, a race team showed up with their big-rig diesel hauler and a 36' MH. Primary resident of the MH was a 170lb Great Pyrenees! Had 2 fans for cooling him and a LARGE dish (think washtub) of ice water. I think he occasionally let the owners occupy one of the beds at night... ;D