Nicole,
You'll do fine. The toughest part is just going. A few days in and you'll wonder what you had to worry about. I'd suggest not worrying too much about climbing and elevation profiles since they tend to psyche a lot of people out. Just go and have fun. Remember one thing:

You will never be here again.

No matter how hard it is, it's only temporary. No matter how beautiful it is, it won't last. Enjoy it all. Don't forget your sense of humor. Traveling with others is usually tougher with group dynamics.

Also, listen to your body more than your planned mileage. Sometimes you just have to stop and that's ok. I've had some miserable trips where we pushed ourselves to make pre-planned points and hated it. Try to be more serendipitous.

Russ
www.epicureancyclist.com