By the way, in looking at your other similar question that has been classified as a duplicate question, this situation wouldn't qualify as a 501(c)(3) as the summer camp would be operated for the benefit
of the 30 members, not the general public. Trying to qualify this type of situation would be impossible as long as the members benefited from the "summer camp" by using it and/or allowing their children to use it.
The reason I asked about the cost of the property is that, should you actually go forward with this project, you should only do so with professional legal advice. An LLC may not protect you or your assets
from the activities conducted at the summer camp. It can get very complicated as to what activities would be protected and what may not be.
In any event, you would want a substantial liability
insurance policy, which may not be able to be obtained at a reasonable cost.
If it were me, I wouldn't want to be an owner as an LLC member or any other form
of ownership involving 30 different families. I'd want to set something up where I could use the property, but not have any liability for anything that may happen on the property, except thorough my own negligence. Just introducing alcohol to the equation could have far reaching liability implications particularly when you are dealing with multiple personalities, their spouses, guests, children as they mature.
You need to think about this very carefully.