You're not too early to list it now. Tickets for that event are already on sale, so many people have made plans.
As for the rental value, look at other rentals for your resort Redweek and other Internet sites (see the listing of timeshare resale/rental companies in the sticky thread at the top of the list of topics for this Buying, Selling, Renting forum). Also do a Google search for the name of your resort (in quotes if it's more than one word) and various combinations of selected terms that might return rental listings - such as timeshare, rental, rent, etc. Then list your week at or below the low end of what you find.
Also, for more help on the rental process, see the "how to rent" sticky thread, also at the top of the list of topics for this forum, and various articles in the appropriate section of TUG Advice (link at the top of this page).