Will the brush place take boards?

I have a customer who wants me to clean up a property by the water where a bunch of dock boards and palm tree fronds have washed up. I don't see why they would care other than the fact that they have nails in them, but I will probably have to cut them up anyways, so I can just cut the nails out.

They don't open until Monday, so that's why I'm asking on here. This place is pretty lenient, they've let me dump old mulch before. Imo it's wood, so why not right?