New 5th Wheel. Anything I should get before picking it up?

Get the best hitch you can afford. When we purchased our first FW dealer installed a Reese hitch and it clunked and was a pain to unhitch. Two years later and new truck, sent Reese with the old truck and had dealer install a B&W Companion and Turnover Ball. Couldn't be happier with the B&W. Solid as rock and no noises. Buy your hitch once.