Well my first question is "Are you going to the con to hook up?" Â If so looking at the proportion of males to females may not give you a good picture.
I am guessing you are a guy looking for a girl. Â That said there is going to be a percentage of guys there that will not be competing with you for any available women. Â Some because they are mated, some because they are not at the con to "hook up" and some because they are not interested in women.
Beyond the opportunity to "hook up" there is a lot of fun to be had at a con. Â Don't let the ratio scare you way, go and have some fun!
EDIT: Btw, you are only about 4 hours from MFF and its about a month away. You should come down and have some fun!