The official hotel for JAX Expo 2015 is set and we are going to be at a Holiday Inn Express close to the university. The group rate is $89 a night for a king or two double beds with breakfast included.
Unfortunately I couldn't get anywhere near the great rate I got last year because The Players Championship starts the next week - some hotels wouldn't even give me a group rate because they were booked! So my suggestion is to book early. Our group rate is good until April 13th and after that it will just be the standard room rate.
You can call the Holiday Inn 800 number (888) 465-4329 and mention the Jacksonville Arcade Expo for the group rate.
Holiday Inn Express & Suites (Jacksonville SE)
4791 Windsor Commons Court
Jacksonville, FL 32224
http://www.ihg.com/holidayinnexpress/hotels/us/en/jacksonville/jaxwp/hoteldetailIt is a nice hotel in a good area but a bit quieter area than last year. It is 3 miles from the University Center and very easy to get to the hotel and JAX. Again, if you have trailers you can drop them in the back of the expo parking lot so you don't have to worry about finding space at the hotel. The hotel lot is average sized but it is next to a Publix so there is lots of parking just adjacent to the hotel if needed.