What are some really good pranks to play at sleep away camp?

So me and my friend (both girls) want to play a lot of pranks on our guy friend (with the help of a guy friend in his cabin). So far we've thought of stealing his underwear and bringing it to the lost and found so that in the morning they keep calling his name in front of the whole camp and giving his underwear, short sheeting his bed, TPing his bunk, dipping his hand in warm water while he sleeps to make him wet his bed, and putting salt in his bed to make him really itchy. (We sleep in cabins not tents with bed frames and mattresses). Does anyone have any ideas on other pranks to pull?