Does anyone have any tips for how not to keep bottoming out in shallow water?

I was out on my big board (it didn't look very windy on the forecast, ended up blowing in the high teens, was spewing I left my 136 at home as the big one is harder to go upwind with) yesterday and got trapped in the maze of sandbars at Altona.

I must have crashed at least 10 times because I caught a fin.

Don't kite in shallow water or go so fast you just plane over the top of the sandbars?

Bit hard when there isn't enough space for apparent wind effect to kick in.