Are you talking about when renting a car? I've never had to show an insurance card, just let them know I'm covered, and they ask for the insurance company's name - that's it. I do carry my card with me though, just in case.
Yes, sorry I wasn't clear.. it was for rental cars.
Thanks all, we leave in a few hours for Portland and are spending the night.. then onto CA tomorrow!
You should be fine. I checked with my insurance company (USAA) to make sure everything was covered, and we were. I'm sure you'll be fine if you have your card. Have a fabulous trip!