Anyone pulling a Montana 3120 with a SRW short bed?

We pull a VL 320GK with our Chevy Duramax 3500 short bed. That’s about the same weight and size as your Montana. I use a SuperGlide hitch, and loaded weights are right at the rear axle capacity rating; I wish I had more margin there, but also don’t want a dually. We’ve pulled about 25kmiles over a couple years with this (and another 30+k with a similar previous 5er) and are very happy with it.