I am planning a flight to South Dakota next week and was looking for a stop kinda of midway between Orofino S68 and Isabel SD 3Y7 and came up with Roundup Montana KRPX. It appears to fit my criteria of fuel and " Good Dirt ". Anyone ever stop there ? Any other suggestions ?

No information on Roundup.

BUT, right about in the middle of Montana (maybe a bit far north for your purposes) lies a little town called Winifred. Friendly place, HUGE hangar (and they'll let you put a plane in overnight if need be, fuel prices are lower than most, and the burgers downtown are belly busters.

MTV

It's on a hill, so it's a little hard to check your tanks but fuel is cheap and they have a car. Keys are in a lock box set to airport freak or 121-5.

Stopped for fuel and an overnight snooze under the wing at Roundup in 2009. Fuel was relatively inexpensive, the car was available - key in the lockbox (see photo), 3 minute drive into town. Very quiet, didn't see anyone else at the airport. Departed at first light, you can see the town in the last photo.

http://www.backcountrypilot.org/me/my-photos/307-tonyhunt/album?albumid=3343

Departing KRPX:

If you find yourself going a lot more to the south and find yourself near Three Forks, MT and have time to spare for a good meal. Wheat Montana Bakery and Deli is really great! Fantastic service, too. Just a little ways from the airport and I'm not sure if they have a courtesy car.

Thanks for all the comments guys. As usual this forum is a great source of info and support.

I was in roundup this summer - good spot as far as I recall - to get fuel anyway. I was on my way from spearfish, sd to Winifred, mt