Is it ok to run savage 21 on sand?
I think that it is fine to run your truck in the sand, only if you properly seal of your truck, just as WeirdKooky said.
I think that if you follow the right instructions then you should not have any problems. Yes sand is corrosive, only if it can get inside.
Many people run there trucks in sand and do not have any problems, I love to run it in the sand.