If you are on land from dusk on, assume sand fleas will greet you. We haven't had any problems at anchor or mooring with bugs, aside from the occasional critter here or there. We did notice that wet towels/clothes were an attractor in the evenings - maybe keep those away from gathering areas. We switched from DEET to Picaridin about four years ago. We use the Sawyer spray and found that we only need it on our legs in the evening on land. Of course, everyone will have different results, but we found it worked the same as DEET and it was much easier on our skin and gear. I can't count how many items of fishing, diving, or other gear I've smudged up with DEET melting the plastic. And it is easier on sunburn