Not much to stop you going over the edge.
More twisties.
What a fantastic trip, I'd recommend anyone going. There are camp sites everywhere and they're cheap with hot showers included and you don't need to book in advance. Make sure everyone knows the destination of the day and have each others phone numbers, in case you get seperated, as I did, twice! Once in the middle of a Swiss city, and then on the Belguim motorway during rush hour in the pissing rain. It's easy to laugh afterwards. I took about 150 pics but I could have taken twice that. If you take a pic of every great view then you'd never have time to enjoy all the biking.