All summer camps are good. Chances are, that if you go once, you will return another time.
In my Opinion..............Summer Park Camps are more about the experience than they are about coaching and skills progression. The coaches at COC in my opinion, are more celebrities than they are trained instructors. If you are adamant about going to a summer camp to learn, then I would make it very clear to your coach on the day you arrive of what tricks you want to learn, then stay on his ass if you feel you are not getting attention. Matt Sterbenz will likely be your coach. Start with a list of goals or tricks that you want to learn this season, then make a new list for camp.
My son has gone to COC for 3 years now and will be there under the pro camp program next summer. he can be a good teacher when he isn't distracted. I know he is always looking for people to ride and film with. He would be stoked to know that you are from "home".
Go to a summer park program for the overall experience of having fun first, go to learn new skills second.
Momentum is the camp that has the best reputation for instruction, for the park. But that is second hand info. COC is the biggest and the best and the most expensive, they have doubled the amount of terrain in just 3 years and are continuing to grow. It won't surprise me if they run the whole glacier in the years to come..