Sadly I haven't checked out the lockers, so can't answer that question (I can look next time I go)...but, water rides:
1)Treasure Falls....tiny log ride...little splash...got about 5 ozs thrown at us.
2).Soak and Sail...scaled down playground part of a bigger water park.
Kids get wet like swimming wet, slides pouring buckets etc. Lovely benches in the dry for me!!
3). Splash Battle...you get wet as other boats spray you as do spectators...you get wet wet wet or just damp...never know. I've always just worn my normal clothes and dried out in time. (in the hot months). I wear non-knit clothing for ease of drying!!
I will check out the lockers next I go. They are a new feature this year. I may even try the SOak and Sail now that here is somewhere to leave my camera and wallet!!
Hopefully someone else can talk about the lockers!!