It looks like you'll be doing a lot of inland lake activities on the water. In order to do some more advanced stuff make sure you touch base with the health services folks via the link I posted above. You may also want to find a way to get involved with activities closer to the coast. One way to get a slightly broader exposure to both the Aux. and the active duty (and provide more medical opportunities for yourself) may be to get involved with airborne auxiliary stuff. Check out the link http://a05420.uscgaux.info/contact.htm
and mention you're looking for an Aux. unit in N.C.
First, focus on getting through the basics of becoming an Aux. I highly recommend you qualify as Aux. crew on Aux. boats to get your first taste of what you're in for. Also consider taking on a staff position in your Flotilla if your FC offeres one to you. This will get you used to the paperwork and administrative issues of Aux. life. Once you've got that stuff under your belt and also started on any qualifications for general medical stuff, look into aviation. That way you'll be exploiting the maximum number of opportunities to contribute and to benefit.
You don't have to change membership from one Flotilla to another to fly, you just have to ask to be trained and for the DirAux of 5S to accept you. Talk to your FC and make friends with folks in your Flotilla. It is vital that you find someone to be your mentor to help you learn the ropes. If you really apply yourself it is possible to really contribute as an Aux. for both Aux. activities and assigned to duty augmenting the active duty on a cutter, station, airborne or wherever.