Changing our address again !!!

You can use any mailing service in any state and still be a resident of Michigan. Just keep your drivers license, bank etc and use your son's address as your "residence" address;. You would then use the address the mail forwarding service gives you as your "mailing address". You then have all your mail sent to your forwarding service who will send it on to you whenever you request it. Many campgrounds will accept mail, or you can have it sent general delivery to a town where you will stay for a few days. You then use your son's address for your taxes or anything that requires the resident instead of mailing address. Most things you can use the mailing address. You can list both a resident and mailing address (different) on your taxes too.