Sounds like your "Friend" has just about loaded that Scamp to the Max. It's got an axle rating of 3500 pounds. I'm a little confused though, first you say single axle, the you say two axles. Scamp doesn't make a two axle trailer. With that load your "friend" should go to a "D" load rated tire, don't putt anything else in the trailer.
__________________
|