We have done the BBQ at HHI for the past 2 years. If I recall the price was about $20 for kids and $40 for adults give or take a few dollars. The food is your normal bbq fare...hamburgers, hot dogs, chicken, ribs, corn on the cob, apple pie. They have a DJ and play lots of poolside games. You do not have to attend the bbq to participate in the pool party. I believe the bbq is on Tuesday's, and yes you need reservations but you can make them when you get there. We had alot of fun at the bbq and the kids enjoyed it however when we go this August we will not be doing it again. I think twice was enough. If you don't go to the bbq definitly go to the pool party.