Well got to take the camper out for the first trip

Got a question, how hot/warm should the rims/hub cover get? I checked them when we stopped and they were pretty warm. The trip was only about 1/2 hour or so but little hilly. I just never had a trailer with brakes before and want to make sure the temp. was ok. I do have new bearings in there also, i will be jacking it up to check them just to make sure they are not too tight. (didn't think they were when i installed them)
ps where should i post pics and about my trip?
Thanks
Steve