Personally I would not sit near the big wave pool or on the big sandy part just behind the lockers
At Typhoon Lagoon I've always walked over the first bridge, the wave pool on the left of me. Walked all the way towards the bridge going over the lazy river. Once over the bridge you can find some spots (near shark reef) that are more enclosed. Like that it feels a little more private and less crowded... Some of these spots might just be big enough for a party of nine, making it a little priave corner...
Enjoy your stay