You don't want to wear scratchy, rash inducing pads while you're camping. You don't want to have to get up in the middle of the night and stumble through the dark to find a place to change your tampon. You definitely don't want to wake up and discover that you've leaked all over your sleeping bag and then have to make a dash to the nearest bathroom to clean up and change. You don't want to camp like that on your period.
You want a Pixie Cup.