Park Patch Collectors & Sticker Enthusiasts - Park Shop Memorabilia

Outdoorsy friends - I'm working on a piece about park patches (which you might also call badges or crests - those lovely little embroidered beauties you buy at national park or provincial park gift shops). I have some awesome sources but would welcome more. Are you a patch collector? Or perhaps you go for something similar (like decals, stickers, or magnets?) (Photo of me, super cute, camping in Botswana in 2018).