Meguiar's Flagship Cleaner/Wax is very popular and is a good product. I've just started using Protect All which is a carnuba wax based product. I really like the ease of application. I use it in a spray bottle, spreading with a small rag. Then, it wipes off very easily with a dry rag. I used it on my car and truck also and it seems pretty durable.
If you do a search on waxes, you will see lots of responses and comments about wax and decals. Can't help you with cover information as I've never had to use one.
2012 Newmar Bay Star 3302
Blue Ox Avail
BrakeBuddy Advantage
2015 Malibu
"Get busy living, or get busy dying."
Andy Dufresne, The Shawshank Redemption