I've been towing for thirty years or so .. Two campers and a cargo trailer .. My campers each weighed around 400# empty , one was pulled with 1984 and 1988 Tour Glides , and the other was pulled with this '11 Ultra . Managed mid thirties fuel mileage with both . Cargo was an Escapade weighed about 150# empty , didn't know it was there ..
Big thing is slow maneuvers , you will know it's there then ... And pay attention to braking distance . No issues with trailer brakes personally ..
Aspen is a quality camper , one of the better ones ..
Wheel bearings .... And put enough air in the trailer tires to keep it on the road , if it bounces all over the highway , let some air out .. My last camper tires were rated at 40 psi max , and the sweet spot was 26-28 psi ...
So Many Highways So Little Time