When we bought our Roo 19 (probably ~4000lbs loaded) we pulled it one season with our 2011 Chevy Traverse (basically the same as the Acadia, although you probably have 7 more hp, and ours is FWD).
I wasn't happy with it. We're in the mid-West and even on the flat interstates, it ran in 4th gear at ~3100 rpm. Any little increase in slope would make it drop into 3rd. Once in a great while it would go into 5th, but not very often. It wouldn't let me force it into 5th with the manual shifter. There are people on the Traverse forum who pull heavier trailers than my Roo and don't seem to mind running at 3100 rpm in 4th gear all day, but I sure wasn't.
The problem really isn't the weight, it's the drag.
So I bought a Silverado with a 7500 lb tow rating and I'm a LOT happier. Even moved up to a Mini-Lite and I'm still good.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10