Hi guys,
Haven't really been following this discussion, but hope your game is coming along well! A couple of new games came out that you should be aware of:
one is "Secret of the Tomb", a game about a treasure hunt in a pharaoh's tomb. The other is "Yellowstone", a game about trying to see sights of great beauty. Both are no doubt very different than the game you're creating (and I doubt if you're really thinking about publication anyway), but you might check them out if interested in similarly themed games and how those designers solved the problems you're no doubt working on.
-Jeff
Here's info on Secret of the Tombs, which is probably much closer to your game than Yellowstone. No description of mechanics, but the photos say a lot about the game...
http://kumquat.com/cgi-kumquat/funagain/14436