Welcome to the XLR family! You have gotten some good advice! I agree that a 10' and 25' white water hose is a good idea. Coiling a 50' hose is a pita. Harbor Freight sells nice black rubber wheel chocks to use BEFORE unhooking the trailer. I cut a 1"x4" board and use it for leveling the trailer. I also cut a 4"x4" board to use under the tongue. You will be amazed how often you need them all.
I advise making a departure and arrival checklist - if you want to PM me, I can send you our lists. You will struggle a little at first but backing, unhooking, and hooking up becomes easier soon.
Jim & Nicky
2012 Forest River XLR 29 MBV
2010 Dodge 2500 Cummings