What's the best size trailer (utility) to pull with a 4 cyl. Saturn Vue?

I want to buy a trailer for my Saturn. I'm using this trailer for extra camping equipment. I've heard that the bigger the tire the less likely the bearings will burn out. This will be about a 2000 mile trip. My Bro - n- Law has a small trailer that would do the job,but I worry about the high ,sustained speeds, between 60 and 75 mph,if it will burn the bearings out.