This is what it says on Allears:
"Locker rental at all four theme parks is $5 a day plus a refundable $2 deposit (price subject to change). If you park hop during that day, don't collect your deposit, but hold onto your receipt and show it at the locker rental at the next park. You only need to pay once a day for a locker. At the end of the day, collect your deposit before leaving the parks."
I'm not sure if they come in different sizes or not, but the ones we have rented hold a lot of stuff. We kept swinging by to put things we had purchased in the one we had as it was our next to last day and we couldn't have things delivered to the hotel. Turned out to be very handy!
I think there are almost always plenty available. Hope this works for you.
"Locker rental at all four theme parks is $5 a day plus a refundable $2 deposit (price subject to change). If you park hop during that day, don't collect your deposit, but hold onto your receipt and show it at the locker rental at the next park. You only need to pay once a day for a locker. At the end of the day, collect your deposit before leaving the parks."
I'm not sure if they come in different sizes or not, but the ones we have rented hold a lot of stuff. We kept swinging by to put things we had purchased in the one we had as it was our next to last day and we couldn't have things delivered to the hotel. Turned out to be very handy!
I think there are almost always plenty available. Hope this works for you.