What should I wear to secure my phone on water rides and roller coasters? Or do u guys sell phone pouches?

You can purchase a water proof pouch to store your phone and cash at the park. You can also find them at Wal-Mart which would be cheaper

I would get them anywhere else for less, and Amazon before Walmart any day, on grounds of conscience.

Put it in a plastic baggie cheap and works well

Get a pouch from Amazon or use the storage lockers

Storage lockers and you can leave them at where the ride starts at.

Yes

There are storage lockers to keep your stuff in throughout the park. You can also put your stuff in a carry bag which can be stored in the ride stations while you are on the ride.