The closest airport is
Jacksonville International Airport (JAX)
Jacksonville, FL 32218

Hotel is
Wingate by Wyndham-Southport
4681 Lenoir Avenue South
Bonneval & Butler
Jacksonville, FL 32216 USA
Phone 904-281-2600 (Reservations also at 1-800-228-1000)
Fax 904-281-1166
Website http://www.jaxwingateinn.com

Hotel rate is $62/night, including free full Hot Breakfast Buffett, free Wi-Fi, free shuttle to University of North Florida (not from the airport), etc.

Cancellation: You may cancel 24 hours before arrival, with no penalty.
Group name: International Sommability Conference-UNF (this is how it's spelled on the contract).

A block of 20 rooms is being held for the conference.
This block will be open for reservations until two weeks before the conference.