I've been towing my Casita fiberglass trailer with my 2018 PacHy... total weight with water in the tank and gear is probably about 3,000 lbs. Tows great, barely notice it's back there on the road.
My only issue so far has been trying to pull it up a gravel road to get out of a camping area... road was fairly steep, rutted and loose gravel. Seemed to lose power halfway up the hill and came to a stop. I ended up making it out by getting a running start to have enough speed/momentum once I hit the hill to make it up to the top.
The first few attempts, once I was stopped on the hiil, it was as if the van didn't have enough power to get going from a stop at that incline, and I had to back down to level ground before giving it another attempt. Front wheels slipped a bit.
In hindsight, I'm wondering if that was the traction control, and if I would have been able to get moving again and/or made it out without a running start had I disabled traction control.