Sevletunet is a very good choice if you want to take your group to a journey from west to east for instance, or just a smaller round trip.
Numedal is a good choice since it is less traffic and more beautiful nature as many other valleys. And it is the shortes between east and west!
Why take a stop at an ordinary restaurant/hotel when you can come to the old farm? Here you get a traditional, ecological meal (dinner, lunch, coffee food) at a reasonable price, inclusive of story telling about things that has happened in real life in Numedal, in Norway and at this farm.
This fits very well for bus groups and for small organizations who want to go for a trip.