Sure, you can launch anything at Potlach. Just remember if the tide is out, DON'T BACK ALL THE WAY DOWN THE RAMP!!! Back down the ramp almost to the water, but then back off on the right side and launch from the dirt.

The ramp is torn up pretty baddly down in the water and you will either get stuck or ruin a fender or something. The right side is pretty stable and level.
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Organized people are just too lazy to look for things.