LOCAL UNIT: Membership in both WBCCI and a Local Unit
MEMBER AT LARGE: WBCCI Member without a Unit Affliliation
If you have a "home base" and want to be involved in the club with folks in your area, rallies, "off-season" get-togethers, caravans, etc. you will probably want to join a Local Unit.
If you prefer to travel around more & you just want to drop in on an occasional rally, etc. or there isn't an active Unit near you, a Membership at Large would probably be more suited to you.
Either way you could attend rallies and caravans...it would just be more if you are a loner or a people-person IMO.
Unit membership is another couple of dollars over M@L...
You must be a member of WBCCI (parent organization) to be a member of the VAC (IntraClub).