Four years ago when my son was headed off to his first Scout summer camp to a location known for a heavy mosquito population, we asked the staff at REI for their suggestions. Some repellents have very high levels of DEET but we were told that this was not really necessary and that high levels would almost always stain clothing and that it would also damage polyester (i.e., dissolve it). We purchased Untrathon with 34.3% DEET, a pre-treated bandana, and also a spray for clothing (forget the name of that). Our son came back from camp and reported he didn't have problems with mosquitoes. We heard a lot of stories from others that was much different with one adult having about 100 bites. Most said it was terrible. Our son just complained about the food except for the night they had hamburgers. We've stuck with that and it's worked well so I would suggest giving it a try. I know it has some negative reviews online but mostly good reviews. It's probably best to go with the full measure of protection with sprays for clothes and the bandana.