You might give Susan Harris at Spring Run Farm in Louisville, Kentucky a call. She has a horse trial every year, so may have a few stalls available for an overnighter. Check in the omnibus under Area VIII for contact information.
Don't know much about Kansas except that it is a REALLY, REALLY long drive from one end to the other. I drive to Colorado every summer, and when I hit the Kansas leg, my mom calls me every 3 hours, and I always have to say, "Yep...still in Kansas."
If for some reason you decide to take I-40 instead, you're welcome to stay at my place. We're right off I-40 just outside Nashville and we have big stalls, turnout, rings, the works. Also have an apartment in the barn which is unoccupied if you want to bunk with the horses. PM me if you decide to come that way-
What interstate are you taking that you'll go through KY? I do the Maryland-Colorado drive a LOT and usually jet out I-70 the whole way there. If you get an early start, Indianapolis area would be a great stopover, though I admit I usually stop in Ohio and Kansas when I'm doing the drive w/horses.
Kansas is a looooooooooong state but it's very rural with lots of potential stopping points. I second the idea about those horse hotel guides -- a CURRENT one. You should at least have it with you in case you run into some kind of mechanical problem and can't get as far as you want in a given day.
If you'll be coming through Lexington, Saddles & Sheets http://www.saddlesandsheets.com/ is maybe 3 minutes off the interstate (I-64 that is... maybe 15 minutes off of I-75). They're on the nationwide overnight directory and have a lovely facility dedicated to layovers. You, your dreams, and your dogs would be welcome to stay with us (we're about 5 minutes from S&S). Good luck!!!
I board and train with LAZ so if your horse ends up staying at her place you and your dogs can crash at my house as long as the dogs are cat friendly. I have a fenced yard, two dog-friendly dogs and two cats. I'm about 15 minutes from LAZ's place. PM me if interested.
"If ever I did not have a horse or dog in my keeping, I should feel I had lost touch with the earth." ~Beryl Markham
I think you should take revyhorse up on her very generous offer. Stoney Meadows is right off I-70 but not right off an exit, so you have a bit of meandering to get there and that means that 3 Chestnuts wouldn't be that much more out of the way. But at 3 Chestnuts you get an honest-to-goodness and terrifically fun eventer to host you.
Wonderful that you and Andrew are teammates together. Have a great run!
I second taking revyhorse up on her offer. 3 Chestnuts is not that difficult to find and has large stalls for overnights. Revyhorse has a lovely house, wonderful husband, two awesome dogs of her own and is just a heck of a lot of fun!
A horse may be coaxed to drink, but a pencil must be lead.