From what I see in the pics, the glass substrate has not been damaged, it's only the Gelcoat that's chipped off. If I were me, I'd go to Ace Hardware and buy some PC-11 2 part epoxy filler and then sand the gouges well with 60 grit and then wash with Acetone. Mix the PC-11 and then fill the areas using a plastic putty knife to smooth. It'll be ready to go to the lake in 30 mins.