Wow, Susan, hope you have a great time!!!

As for carrying the extra tire ... hmmm. Definitely make sure you have an extra tube or 2, but an extra tire might be a bit overkill. Then again I don't know what kind of tires you ride (if they are the ultra lightweight kind then maybe it might make sense) or the kind of terrain you'll be riding over.

Let us know all about it when you get back.

- Jo.