Tony, in your favour you only have two glue lines. Also in your favour the boards at 11” or so and fairly thick no doubt are very stiff, the clamp force applied will spread evenly.
What you do need because of the stiff boards is very straight well matched glue line. The clamps are not going to close errors, however many you have.

I see the boards stacked on edge with a lamp behind them and much fine tuning. When you are ready, my table top experience says a clamp 2” from each end and a clamp every foot is plenty. A rope wrap can be added with the clamps if you are short.