How fun! :) We went to the Grand Canyon a couple years ago...I guess three years ago, when my older 3 kids were 7, 4, and almost 1 (he was 11 months). It was a 2 week long driving/camping trip, and we went with my MIL and FIL, and with my dh's brother, SIL, and 3 of their 4 kids. We went to the North Rim, and it's just amazing and gorgeous and breathtaking! :)
And when we got back, I took an HPT less than an hour after pulling into our driveway, and found out why AF never showed on the trip. (and welcomed baby #4 about 8 months later, lol!)