Along with a map, I like an all-in-one-spot listing of where the pins are currently located if the course has multiple pin locations. A single printout posted as a flyer that can be photographed works. The majority of these I have seen tend to be worded with the local player in mind: "pin is in alternative position, 12 yards left of the original position." If I am a person just traveling through town, I don't know original from alternative, but I would like to know where the basket is. This also tends to be a problem when alternative pins are added without maps and tee signs being updated.
Lesson here: Keeping information updated is what makes the information have any value, but consistent/constant updating is tough work. And if you tell me donations go to either 1)course maintenance or 2) updating signs/maps/etc., I'm more likely to leave more.
And, while we are talking Kiosk design here, it's really about the complete package: good maps (updated as needed), current pin position info, good tee signs (updated as needed), and "next tee" signs on/near baskets.
I don't really need anything else though I always read course/club histories, tournament results, lists of local DG stores, food sponsors (with locations), etc. If you can send me to a food place that supports disc golf, that's where I'm going.