Is there a way I can use PGC to filter finds by certain attributes so I can check potential challenges to place in my local area without asking the people here to make redundant checkers?

If you are a paying PGC member, you can set up a custom filter with an attribute statement, otherwise, I dont think there is a way other than going through everyone’s profile stats.

You may also put qualifying caches into a Virtual GPS and use that as a filter. Not all the statistics tools accept custom filters.