Are there lockers

Yes. They're $1 an hour

Yes

Yes, small $1 ride lockers and several houses of all day lockers from about $12-$20 depending on size.

Yes, you can use it all day. Some are really big

Yes, not too costly and pretty decent ones, but since it's a big park getting back to it all the time might be inconvenient. Take a small impermeable pocket case or belt bag to carry cell phone, money/cash and sunscreen.

There at the waterpark too 😊