I'm not aware of any, unlike some of the Rocky Mtn. Parks with fairly specific rules and regs on these matters.  

Read any of Cliff Jacobson's books and you'll see that he suggests stashing the food of in the woods, on the ground away from camp in a Canoe Pack.  (Evidently mice don't inhabit Cliff's world).   ???

Most of us here are probably 'hangers', with elaborate and cunning systems utilizing pulleys and mechanical leverage -(though some of us believe that Hope is indeed a strategy and simply leave food in camp with a pot balanced on top of the food pack).  :-/

I think if you use a vittle vault and place it away from camp on your solo trips your granola bars will be safe.  That's more or less what I plan to do on future solo trips, especially since I forgot my food hanging system up on Insula last September. :'(

If anyone found it, please feel free to call - big reward offered!