Soldato
I'd love to give my cars a run on the beach! Definitely something I need to try out this summer. No experience over what would work well though, but that thread linked above looks a good starting point. I think providing you go in expecting to need to do a decent clean afterwards it should be ok? Unless it's particularly fine sand I can't see it being more problematic than the general dust and grit you'd get all over the car driving around dirty track and gravel. Make sure you give it a good rinse to get off any salt water from metal components too.