If you chose to be a nomad in a motorcoach for 2 years, what would be your address?

Say you got a wild bug up your butt and sold your home and purchased a motorcoach that you could live comfortable in, and took to the road to drive where the wind or whims took you. If you had an account with a national bank chain, and a job or work where you can take it with you and did not have to be office bound, what or where would your address be, if you were on the road for 24 to 30 months? How would you get any snail mail? Does that mean your phone would be forever “roaming”?