I've seen the question before but forgot the answers: what is the most effective bug repellant for no-see-ems (sand fleas)? I am not only attacked every time I step onto the beach but am also extremely allergic. I plan on having a great time while relaxing at CSS and want to be completely prepared this time!
Anything with 40% Deet. Also, we'd heard that taking vitamin B complex a couple weeks before and during the trip can act as an insect (sand flea and mosquito) repellent. We tried it last year and it seemed to work well.
Hope this works for you!