1. Small Mike & Ike or Now n Later are usually 25-50 cents. Single mints, Tootsie Rolls or Jolly Ranchers if they have a bucket at the counter are 10-25 cents. 5-stick gum packs are 50cents. Cheap brand cheese crackers, usually under a dollar.
2. As the quarter wears on, the MSC is more open to fee negotiations. Especially for way-out-there locations and routes.
3. Don't walk the gas station, drive it. Do the store thing first. When you get to your car open both windows to take pics out of both sides. Drive a lap around the lot getting most of the pics. Pull up to a pump for the photo there. But not too close. Or take the pic of the pump to your right if the distance is better. Zoom in for the security seal/infractions pics.
4. Drive off the lot but nearby (in case you need to go back for a missed/blurry pic). Fill out the form, cropping photos first if any of your car parts are in there.
Worst case, you've got the LOA if you need it.