MAIL.. There are many "Store and forward" mail places.. I use one called Postal Depot, but the UPS stores generally provide this type of service.. They will receive mail for you, and put it in a standard post office box.. But if you leave some excess cash with them (Postage account) when you park somewhere for a week you can give 'em a call and they ship a "Care Package" out postal express (or other depending on your preferences).
Prescriptions....
I have two kinds, Non-perishable ones can be sent by my mail order pharmacy to my PO box at Postal Depot and forwarded. OR directly to me at the park. Insulin which needs to be kept cool. Direct to the park.
Other prescriptions (Sometimes the mail order pharmacy is more expensive) I get through Wal*mart.. Wal-mart is nation wide, and when you go in to refill they contact the other store and transfer it.
Even better (though often more expensive) Walgreens, CVS, Rite-Aid are all nationwide pharmacies.. In many of these (ASK THE PHARMACIST) you can drop off a script in say Detroit, refill it WITHOUT TRANSFER in Las Vegas.. Been there, done that too.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times