I'll be there raisindot and you'll sort of know me!
I went on my own to the one in AZ and that was my first con, so I totally understand how you feel. Everyone was fabulous and really made me comfortable. I had a great time! The costs are a real issue for me too. I'm driving instead of flying and thankfully I'm able to share a room with someone I know from another forum and met in person at the last con.
As for feeling like a wanker for going.... well, I'm still struggling with that one!
Hubby is very supportive, and the rest of my family doesn't bat an eye over it, but when I tell other people I just say I'm "meeting friends for a quick getaway."