Congratulations! We have not had aTT for years. We finally bought one a couple of months ago. We're going on our first camping trip with our new TT on the Memorial Day weekend.
If you haven't already done so, create a categorized packing list of things you would always take. For example, refrigerated foods, non-refrigerated foods, medications, clothing, cameras, etc. Under the category of "Menus" Ihave a list of menus to choose from so that I can add those ingredients to pack. I print a new copy for each trip, and check them off as I pack them. This way, I won't discover at the campground that I forgot the mustard or mayonnaise, etc. It also takes very little time when you don't have to stop and think - what do I need?
Enjoy and keep safe.