Sounds like a giggle. Although I won't be a happy bunny if anything PINK is involved!!
Don't know if Stu would be interested, I will PERSUADE him . Depending on dates of course. Is this not the sort of thing Izzy is going doing 'summer challenge' except it's a monthly thing, rather than a day ?!? Or am I being a tad ... errrrmmm, Simple?!
Somebody else can have the prize,i've already got four cats...:/
AND...having done something similar in a car version many years ago,could i suggest collecting the clues via camera on mobile phone as proof of correct interpretation..we used to use Kodak Instamatics,but technology has moved on.. Clues need to be Slightly Cryptic,but not obvious OR impossible..geographical features(hill,bridge,buildings with unusual features,roadsigns with odd placenames..envelope clues in phoneboxes).....just a few ideas...:) OH,and use quiet backroads,for obvious reasons...need to set people off at timed intervals,too..OR NOT..it's been a long day and Teddy beckons..:/