I had some rodents chew a few holes in my backpack while I was on the wall this weekend. They're big holes, but the pack as a whole is not completely destroyed, so I'm wondering if its patchable. Does anyone have experience patching a backpack, or know of a service that will do it for me?

Bryan,
Check out these two:

Rainy Day Repair
5307 Roosevelt Way NE
Seattle, WA 98105
888-ripstop

or in Boulder:
http://www.ripstoprepairs.com

Just don't take it to your local shoe repair person....I did this once and one of my ice climbing packs now has a leather, yes leather, side panel. Comical? Yes. Functional? No.

function before fashion in crested butte CO is an excellent place to have repairs of this type done. Search them on yahoo.... they do really good work

I had this happen to me when I acquired two puppies this summer. One of the zippers, side pockets and part of the main area of the pack were chewed off. I sent mine into the company repair (Gregory) and they were great! I couldn't just patch mine because I wanted to be able to use the side pocket and needed a new zipper. It was hard parting with my pack for so long (a few weeks) but I had another smaller one to use in that time.