I hope you have a great time. I just rode in that area last week, it is a challenge. It is absolutely gorgeous though. Make sure you have your climbing legs, spare tube, CO2 kit, patches, gels (get them in you at 45 minute intervals don't hesitate as you will burn though energy quickly with those climbs) or whatever nutrition stuff you use on your longer rides. The suggestions above are great.

We did the "Swiss cheese and spotted cows" bike tour and had to sag one day due to energy loss because we didn't stick to our nutrition intake schedule (took a 9 mile wrong turn). We were not quite prepared for the hills there, but we learned valuable lessons about getting and maintaining our energy. And hill climbing. Sounds like you are better prepared for hills than we were.