Any Geocachers here?

[thumper]

I stumbled across a geocache the other day, in a remote, but very sensitive and fragile (dryland) area, that can only handle light, random, foot traffic. I think it was placed very recently, within a week or two and there's already a set of vehicle tracks leading off the main 2-track trail, and straight to it. The tracks might be from the person who set up the cache, or maybe an early geocache seeker. I'd like to contact the person who set it up, and suggest that they remove it, before others follow that set of vehicle tracks - or make new ones.
It seems that I have to join a geocacher organization to access the master list of sites, to hopefully track down the person who set up this specific site. I'd rather not join another group - just for this. I don't want to track down the lease manager, or government/environment people - they might simply shut down all access to the lease - which would be a real shame.
Any suggestions on how to get in touch with this geocacher? PM me please!