Atlantis Lockers

I will be visiting Atlantis in a few weeks and I have a few questions, if anyone can help me.

1. I booked directly through Atlantis to get my day pass. When I get out of the taxi where do I go?

2. I’ve read a couple of other thread about where to store a backpack while at the park. I’m thinking leaving it by a lounge chair is best and locking it up. Any other suggestions or should I just get a locker?

I’d appreciate any advice you guys have! Thanks. 😀