Yeah Hammer, I'd love to hunt it with you. It's the closest one to my house that I have not found yet (that and "Briarpatch", heh heh, you know how hard those micros are to find in the woods )
Ponds, I'm really looking forward to your cache. Sounds like a great idea. I think most folks enjoy a good challenge. I'm not sure if 30 miles between legs is a good idea though...but it would sure give ol JamieZ a good workout on the bike
Regarding the crytography, It is my impression that geocachers in general are a pretty geeky/techie bunch and would welcome a new challenge especially if it involved instructions (sorry if I offended any of you nerds out there in denial but, come on, you hunt lunchboxes with what? I'm sure everyone of us also knows how to program the VCR, right? Or could back BEFORE you got the TiVo)
Mile hikes are good if you want to help discourage it being undertaken in a single day as well as the distance between the caches but like Bitbrain said, it can become a chore to maintain. Just my 2 cents. Good luck with it and looking forward to the challenge.