Begin by forgoing the heavy sunscreen bottles for individual sunscreen wipes, and multiple beach towels for one expansive, lightweight cotton picnic blanket for everyone to sit on (bring just a few small towels pat dry after a swim). A collapsible beach bucket tucks easily in the bag, and, you can shake some snacks into a container that won't spill. These smart work-arounds promise to keep you more streamlined and less sherpa!
http://www.instyle.com/news/mom-beach-bag-essentials-to-pack