ranger1... so you don't get any sand in your sneakers, of course. Ever walk around in wet sneakers with sand in 'em? If not, DON'T!!!

Insect repellant is not necessary while in (>6m from shore) the river if it's that hot (>27C) and sunny. BTW, that's about 20ft and 80F. I don't know the conversion factor for 'sunny'... wait, yeah, I remember... it's 1.000001, but I round it off to 1.