It’ll work fine. I’m thinking the Acadia is rated for 5000. A dual axel trailer just tows so much better than a single, so you have a more balanced load that’s easier on the vehicle.
Just be sure you get the full towing package, not just the added hitch. Hi-cap cooling, towing rear end, etc. If it has a self leveling option, go for it. Totally worth it.
I have an Olds Bravada, same as the older previous gen Acadia and for 4 years I’ve been towing a 22 foot express cruiser at just a shade under 5 grand with a full fuel load. The Bravada with the full towing package was rated for 6000 pounds. It pulls very well. Obviously, on big hills and in traffic it runs hotter. The main thing is in the summer, I just had to get myself to slow down. Not that I COULDN’T tow that load at 65, it’s just easier on everthing if I go 60.
As usual what you can tow and what you can safely stop are two different things. Making sure your trailer brakes are properly adjusted and working well is key. On my next trailer, I’m changing over to electric disc brakes right away, no more messing with surge for me.
Grouse