I think the term is usually self supported. Support typically means having a vehicle carry stuff for you. I personally would still call it self supported if I get stuff mailed to me or what ever. Your trip, you get to make the rules I guess.
On a trip of much length you will need to replenish stuff that runs out or replace stuff as the seasons or the geography changes. I don't see much difference between buying it and having it mailed from home. When the seasons change having the gear for the season mailed from home isn't much different than buying new gear.
When you don't need your cold weather bag any more you might mail it home and get a lighter one send to you. As far as I am concerned you are still self supported. If you choose to call it supported that is your call.
Last edited by staehpj1; 11-09-20 at 07:39 PM.