We traveled weekly/bi-monthly
We would check with a future CG if they accepted vistors mail
If yes....we would have our mail forwarded to them via USPA Priority (3 day)
If it got there 1st they would hold it
IF NO...then we would check with Local Post Office where we were going and see if they accepted 'General Delivery' (not all branches do)
And if that didn't work.......have it sent to nearest UPS Store.
But we didn't have very much snail mail to deal with....so we only got whatever accumulated over the course of 2-3 months UNLESS we knew something important was being sent.