I am going to be going on a road trip to visit my husband in Oklahoma this June. I will be traveling with my two little girls, ages 3 and 1 1/2 from Salt Lake City, UT. It is about a 19 hour drive and I will be all by myself. I am wondering if any of you have tips on keeping the kids entertained/planning ahead/stops to make, etc. I'm kind of nervous about going by myself. Any input will be appreciated. Thank you!