Switzerland is not Afghanistan or Somalia. The natives are friendly and the public-transport is excellent. I would suggest doing your own thing via trains, busses and taxis -- maybe a couple of days car-hire if you really want to stop frequently at 'unusual' places, touristically speaking. There are plenty of cablecars from the valleys, which mean you can ascend without effort, and every town has a tourist office with English-speakers to help you with local plans and permits/tickets etc. Being locked in to a rigid tour-itinerary, with different aims to yours, sounds like a nightmare.
Last time I visited Switzerland I walked from (almost) Austria to (almost) France, via passes over 10000ft high -- I wasn't carrying any LF kit though, just a tiny Rollei 35S. Enjoy your visit, and don't worry too much!
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