Things that really helped us when going to the beach with little kids was a rolling bag to carry all the stuff required for taking kids to the beach. There are several types of beach carts/bags available. We used the Radarbulle bag from Ikea, and that worked well. I bought a mesh bag with water and sand toys and it was handy to have the bag to put everything back in to.
Oh yes we actually have one of those mettle rollers for bags. I would not have thought to bring that!!