Sounds like you are off to great start!
1. a dehumidifier for moisture and condensation. If you plan to camp in cooler temps where you will be running the heat, that would be the way to go. Otherwise the item suggest by MKOJO should work for you.
2. If you have access to power where you will park, to keep plugged in is up to you. If it going to be more than a couple of weeks, I would unplug. Disconnect the battery if you do unplug. This will keep your battery from running down.
3. State parks are a great place to camp and not very expensive. Most will not have sewer connections if that is an issue for you. Reserve America website will et you search available campgrounds by the amenities you may want. Check RVparkreview.com to see what others have said about each park. (note here, I look for a theme in the reviews, not just what one person says)
4. Thermacell for bugs. A good fan outside works great also and keeps you cool too.
5. Some have had problems with Command strips coming loose because of the extreme temperature changes. I would not hang glass from them
Hope that helps