Bell Services, at my resorts, started between 5 and 7am and went until anywhere between midnight and 2am depending on occupancy. And that was for dispatch and bellmen, although at least one bellman was always there at 5am and another there until 1:30am.
The costumes, well, all Disney costumes are interesting. I was deployed a lot (oh, and pretty much expect deployment if you're a CP in bell services or front desk) and worked at OKW, SSR, Caribbean Beach, Coronado Springs, Port Orleans FQ and RS, and Grand Floridian. My favorite bell services costume was Caribbean because it was just khaki pants and a flowered shirt, but it was untucked so it was awesome. Grand is obviously much more professional, as are most of the Deluxe resorts. SSR was my least favorite front desk, because there was a vest and neck tie thingie. Awful and SO hot!
But it's not ugly if everyone else is wearing it too!