If you are going camping, you want to be sure to pack some provisions, meaning food and drink or any other necessary supplies. Water, energy bars, and granola are all good choices.
Provisions is from the Latin word provisionem, meaning preparation. If you are going on the camping trip, you'll want to make sure that you have all your provisions ready to go ahead of time. American pioneers heading cross country on wagon trains were very careful in figuring out the provisions they wanted to bring––they had to carry food to last them a year.