Anyone made a pole stand for mounting a camera?

Was thinking about this the other day while wadding out in water to take photos of people windsurfing.... you could easily stick a pole into the sand.... and mount a camera left on video mode on top..... pics taken from splicing frames.... or left as vid.....

But issues:

Keeping something in wet sand is hard..... it will try to move out....

Perhaps a weighted flat footing.....

And safety.... well its winter and only windsurfers are out.... and could be sprayed fluro to prevent would be darwin awardees...... maybe using pvc piping....

Any ideas? Am sure there are some inventive types here.........