More info can be found here:

www.ipmseaglesquadron.org

While on their site printing out the entry forms, I couldn't find any prices for entry or admission. I wrote one of the contacts and here's the reply I got:

"There is a general admission fee of $5 to just view the models and vendors areas. To enter up to 10 models in the competition, the fee is $15. Each model entered above that is an additional $1. If you are an IPMS USA member, you receive a $5 discount on the contest entry."