Cabanas needed at water park?

[traveler_t]

We are visiting several water parks in April: aquatica (weekday), blizzard beach (weekday), discovery cove (weekend). We are not morning people and will be jet lagged so plan to arrive late morning / early lunch for all of them. We want to make sure we have place to sit with shadow comfortably (2 adults, 2 kids). To that end, in which of the parks is paying for a cabana necessary? Thanks!

 

[CAPSLOCK]

Not needed at Discovery Cove. There are quite a lot of loungers in various areas.