Any product with Picaridan works for me. Cutter Advanced is Picaridan based and won't smell or melt things like Deet products do, and it's pretty inexpensive.

Avon makes a combination sun screen/bug gunk that works well. You can find it online.

I've found that Skin So Soft is useless for sand fleas. I guess if you left it in a thick enough layer it might but that would be pretty awful.