Dolbsss,
You neglected to tell us what the rig is and this can make a serious difference in suggested routes and stops. Some are not trailer friendly and if you need FHU every night, that makes a big change.
I an a refugee from the east coast megaopolis that is required by family to still venture that way on occasion, I and other can probably be more help with knowing what you can/want to do. The dates and locations are a help.
Of the kids and from my experience, the 5yo will soak up everything and drive you all crazy about what she saw for years, and the 2yo, will still soak up a lot, but will not have the vocabulary to tell you about it for another year and an half.
Matt