Take a look at this. Has many options and one says it can set up tax free residence in Florida.
Mail, Banking and Logistics - resources for cruising sailors
Also, RV Camping | RV Camping Jobs | Work Camping and Boondocking
and I know very good Escapees RV Club – the club for all RVers
You can have a legal and useful address and residence, for example in Texas with Escapees. Although some of the above are for FULL TIME RV people, they apply to you.
....These companies specialize in what you want to do and are not informal opinions you might get from me or ?
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