I know it's early planning but it's best to reserve the rooms/vacation house several months in advance. I'm not sure how many will participate...I'll estimate 5 adults (not including girlfriends/wifes if any). So lets assume we need 5 rooms.
Here are two places that would provide the rooms and also has place for outside grilling. The first is where I've stayed several times. Parking is great. The rooms are kinda small but is manageable. The second place is one of the vacation homes I came across on airnb.com. I have not had a chance to really look for the best vacation homes but will continue to research and will post other places to stay.
Preliminary dates: Sept 13th (arrival) thru Sept 16th (departure)
Bella Paradiso (parking is at the rear of the building)
Bella Paradiso Condominiums - Eureka Springs Vacation Rentals
airbnb.com
