Those are about six or seven feet front to rear fender, and I'm pretty sure they have unlimited (well, up to 90 degrees) angles of approach. My concern wouldn't be the weight but the length, where one set of wheels would be VERY close to hanging off the tailgate when down. The bed is about 48" wide.
I'd look at something like the trailer linked below. If you go with a company like Harbor Freight, consider taking the frame to a local welder and have him/her gusset the joints and check the other weld points (or weld the bolted sections). The added strength is imperative with most smaller trailers and will give you peace of mind.