Yep, done the 3K before in a 101 before. The trailer is rated for 1500 cross country and 3000 on road. All the weights listed by the military are their cross country weight limits. Example, a 2.5 ton is 5000 pounds cross country and 10000 on highway.
It's in the manual.
To keep the mulch from sticking and/or falling through the racks, I used tarps up to and over the side racks and then strapped it over the mulch to keep it from blowing out. Also makes it easier to unload.