Been using an eTrex Legend for caching until my dog used it for a chew toy. My F-n-Law and wife bought me a gpsr from MegaGPS.com - Oregon 400t refurbished for $289. Been using it for a week and the paperless feature is great. As mentioned above, don't settle on a lesser unit. Invest in the most top of the line you can afford. Haven't tried the Wherigo game, but the 400t has the capabilities.