Luke, it is quite easy to setup funnels in Analytics "goals". You define an entry point, for example your tour, and an exit point, in my case the joinpage. Under "goals" you will then get very visual info about what visitors are doing and what percentage end up where you want them to go. There's a lot more info, like who abandons the tours, and at what stage, etc.

I am still learning and perfecting this. Epoch has an option to add Google Analytics to product codes, but it does not seem to work. My Epoch account rep did not have a clue either, and I have not followed it up with Epoch yet.