HJL,
One note on this. I’ve had a “mailbox” (mail receiving service) for longer than I’ve been at any address. It started when important documents ended up with the wrong carrier and were “returned to sender – address does not exist”. A full service private mail receiving service can (for a fee) forward any mail, as well as UPS or FedEx packages to your mail. (Note: Wyoming allows PO Boxes as an address for the drivers’ license last I checked.)
Also, with E911, you can’t avoid tracking, at least with cell towers. GPS can be jammed/blocked. Note that 315MHz is common for remotes and is 1/5th the GPS satellite frequency, but short of a Faraday cage your provider will have your location. – T.Z.