your Buick Enclave has a 2000# towing capacity as standard, and up to 4500# hauling capacity if properly equipped. (with a caveat - total capacity)Towing a 2001 Monterey deck boat, 22', Merc 5.7, tandem axel trailer, with a 2012 Buick Enclave with towing package.
Something I did on the triaxle (for the boat) since there was zero visibility of the six tires at night was add a diffuse down light (LED) on both sides. Played with it a good bit to get the angle and lens right to ensure no bleed-off to the sides that would distract those sharing the road (okay, they are mostly passing some 55 + feet of me as I hover near the posted). Interestingly, bought a new 18.0-foot equipment trailer this summer. Picked it up in Somerset, Kentucky where built. It has two features I’ve not seen on prior trailers that are helpful. Side lights similar to what I added to the boat trailer, and all the market lights are cone shaped with rubber boots. Thus, if you catch one there’s some flexibility instead of being snapped. Certainly better to not catch one though.With tow mirrors attached to your side-views, you should get a good look at your tires. I try to check them our regularly when I'm towing, just to make sure everything is OK back there.