We pull a 1995 Model 3023 with our 1997 GMC Safari.

Watch the trailer weight- our trailer axle is about 3200 pounds without our 'stuff'.  I'm convinced overloading is what blew our tire.

We pulled it to Fort Wilderness and back to Rochester, NY with no problems.  Handled the mountains OK.  I did have a transmission cooler added before that trip.

We got 13-16 MPG towing, depending on terrain.

PS
Check your Safari for a vacuum hose draped across the thermostat.  If it hasn't melted yet, move it away from that heat source.  Ours cracked and broke, leaving our controls stuck on 'defrost'.  I finally finished repairing that today.  I routed the new hose over the top of the air intake.  The Safari is the worst engine I have ever worked on.  Everything is very tightly packed.  It has been reliable in that it has never left us stranded.  It's also very versatile when you take out one or both of the rear benches.