Congratulations!!! It is so exciting to get your first TT. I would recommend going to a CG within a short distance from the house. This way you are able to make quick runs back to the house for the forgotten cork screw, spatula, TP, etc.....
I recommend a head lamp be kept in your ward robe. You'll be the one setting up in the dark on the late arrivals and you'll need yours, versus the one's the kids have removed the batteries from or lost. I recommend keeping a small size hand sanitizer with your sewer gear. Single axle, I recommend wheel chocks for both sides of each wheel along with a set of plywood or lego style plastic tiles to help level with. I recommend you get used to a routine of setting those wheel chocks prior to hiking the tongue and disconnecting from your TV.
That's as many mistakes I've made as I can think of right now. You'll earn your own stripes but that's half the fun! Enjoy!
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