Will be visiting Switzerland early next month. I'll be getting a rental car at ZRH and will be heading straight for the toll road to Luzern.

I will need CHF for tolls so I am considering changing USD for CHF to cover my whole trip at the UBS bank in Terminal 1 at the airport.

Is there any reason this is not a good idea?
Is the UBS Terminal bank exchange rate likely to be worse than I can get at a bank in town?
Can I get a better exchange rate using my ATM (Bank of America) card? (BOA charges a flat fee of $5 for each use of the ATM card.

Or, are there other ways to handle the tolls? I plan to get off the freeway in Luzern and take the back roads the rest of the way to Spiez where we'll spend the first three days.

Any help would be appreciated.