Call ahead and make sure the trailer has a winterizing system. If not, have them install one before you go to pick it up. Pick up a couple of gallons of antifreeze, you will need it where you live. Also make sure you have some wheel chocks.
Other things to look for: a package with the manuals for everything, also things like awning rods and jack handles.
Happy Camping! ///// Richard D.
2006 4x4 Ford 250 SD / 2007 Flagstaff 827 FLS
One very patient wife and one furry child who travels with us. Forty-two years of trailering and camping, and I still have a blast.