Mail forwarding will work for anyone. All you do is call or email your forwarder when you want a shipment and let them know where you want it shipped. It will arrive in 2-3 days; 5 days to Alaska. We did this for our 16 years of full-timing and traveling constantly. If the RV park where you're staying won't accept mail then all you have to do is to have it sent to the nearest SMALL town post office c/o General Delivery. It'll be waiting for you. You wouldn't even have to have your mailed shipped as your travel. If you have a house, have it shipped there as soon as you arrive home. It's a very simple process that full-timers and extended travelers use.
However, don't use the U.S. Post Office mail forwarding program. It's extremely expensive.