Adding to what 4_real mentioned, I seem to recall NC being one of the dryer states in terms of the lifestyle (LS) in general. You may want to see if there are any local LS parties/events. It is so much more fruitful meeting people in person versus trying to meet people online.
Also as mentioned, single, or married females with ability to play separate (SFs) are a somewhat rare commodity, and may be more so in your area. One way to find out is to do a SLS search in your area for Bi SFs. For comparisons sake, I did a search for Bi/Curious women from 25-99 years of age within 50 miles of me, and that number came out to 94 total (I'm in the NE).
If I do a search of couples using the same criteria, I get 362 total. Figure on better than half of those couples are looking for an SF, an that's even before I add single men (SMs) to the equation, and there just aren't enough SFs to go around. The ones that are out there get to cherry pick the best scenarios for themselves.

