I have been there three times. They have a nice beach and they serve a delicious lunch.
I never noticed lockers, but I don't see why you would need them.
When we go there I usually relax and have a few drinks. There are some beach toys and nice shady places to relax.
Carnival Liberty New Year's Eve 2007
Liberty of the Seas 5/2008+11/2009
Allure 1/16/ 2011
Vision OTS 2-14-2015
Freedom OTS 3/6/16