What a guy, plays the aging GRANDMOTHER card. Wow, haven't seen that for awhile. Sweet.
For your information JDUB, we did in fact take Jan's grandmother on a trip to the Grand Canyon. She was in the mid stage of Alzheimer's and loved to travel in the coach. Late one evening at a campground in the Grand Canyon we had a Park Ranger stop by to visit. As he started to leave, Mamie (the granny) says "Oh Ranger, I don't know who these people are and I think I have been kidnapped." It took an hour to convince the guy everything was good with us and that Jan was in fact the granddaughter. About once a year Jan will turn to me and say, "Oh Ranger" and we fall out laughing.
That is a true story.
If you are really going to take your grandmother to Yellowstone (and we want pictures as proof) I will admit to having a degree of admiration for the endeavor. You gotta do better than Rest Areas and Tacos. We need to talk. And my ugly comments about Okies don't count for grandmothers.