I'm a Facebook marketing addict. Through trial and error I FINALLY figured out how to get between 15 and 30 "likes" and decent fan engagement every time I make a post.
Here are the top 4 ways you can do it too:
1. Ask a question
2. Conduct a poll
3. Give something away for free
4. Always MAKE SURE you TELL your fans to "Click Like" with respect to your post
Regarding point #1, you can ask any type of question. Trivia works especially well. In fact you could even ask trivia questions about your camp.
For instance, you might ask: "How many counselors did we have last summer?," or "Guess how many kids we had a camp last year." You can use Facebook's new "Question" tool next to the "Status" tab at the top of your page to offer a few multiple choice answers for people to choose from.
Sometimes you can combine a few of the strategies above to really max out your fan page engagement. I had a few extra surf camp t-shirts from last summer lying around which I thought our fans might be interested in having. So I posted the following status: "Click Like if you want a free Billabong surf camp t-shirt." So far 30 people have liked the post. The only conditions to get the free shirt are 1) they need to attend our next open house to pick it up, and 2) everything is first-come, first-served because we only have a limited supply of t-shirts left.
Here's a bonus tip: Tying your Facebook posts into current events also works really well. Aloha Beach Camp's current status is, "Click Like if you don't care ONE BIT about the Royal Wedding!" Well, apparently there's lots of folks like me out there who don't give a rat's ass about it because 9 people already clicked like within about 8 minutes of me posting it. I know there will be lots more! (Here's the link if you want to see it: http://www.facebook.com/alohabeachcamp)
Try some of the strategies I mentioned. I know how bad it sucks to wait around for days with no response from fans after posting a status on your fan page. Let me know how you do!