My family is also moving to North Platte area. My husband works there now, but myself and our boys still live in NY. We will move this June.
We are having a similar dilemma. We have two young boys, and would like to be close to activities, etc... yet would like a smaller community and school in which to reside.
We have looked into Sutherland and Gothenburg, which are smaller communities close to NP. Gothenburg is about 50 mi to the East; Sutherland about 20 mi to the West.
Sutherland is very small, but we have gotten some good information about the schools. Though quite small, they seem to be good an I think it would be a nice place for young kids- safe. We would end up doing all shopping and activities in North Platte- there really is nothing other than homes and small businesses in Sutherland.
Gothenburg is a bit more self-sufficient- It is larger than Sutherland by quite a bit. I have not yet been able to get to much info about Gothenburg, and it is a little too far away from NP for our needs. But it looks to be a nice community form what I have read and learned.
I know, from spending time in Nebraska, there are not many trees.
Like TP said, I do think for your schooling and desire for activity centers NP itself may be the best choice for you. Though Hershey and Sutherland are not far (about 10-15 min drive from Hershey to NP, about 20-30 min drive from Sutherland to NP) they are very small and might not appeal to your needs.
That's all the help I can give you, really. Good luck with your move... I hope you will be happy in NE