If only I could remember where they are, huh. I just walked around the locations for half an hour and found everything.
I found the one in the shack, under the tree, next to the gate and in the patch where there's no grass. I thought it was something to do with the boulder but I don't think so.
there's one under the oak tree atop a hill with one of the batteries, and the one next to the lonecrest gates on the boulder
Thanks mate. Although I have now beaten the game 100%, your comment did remind me that I need to play the newest Pumpkin Panic update.