If you're renting out both houses then typically you're free to claim a more tax-friendly state as your permanent residence. But first, check on your two states to see if there are any loopholes in doing this. Each situation is different and you definitely shouldn't go by heresay.
Also, we've been Escapees members for 16 years using their mail service. It's a great organization for full-timers.
There are a lot of perks but the best advice is to get involved with the club - go to one of their Escapades complete with Bootcamp for beginners. You'll learn so much and you'll make wonderful friends. Go to individual state rallies. Michigan has a fantastic one. Stay in one of their own parks - a few we really like are in Summerdale, Alabama, Benson, Arizona or Chimacum, Washington, but there are others. Especially being at one of their parks during the holidays is a great family atmosphere with a wonderful holiday meal. Good luck and much happiness in your new lifestyle!