I have a suggestion! We just stayed in one of the cabins at this place in Strasberg:
http://www.beavercreekfarmcabins.com/
It was so nice! In the warmer weather there is a pond to sleep in, a pavilion with picnic tables and a campfire, lots of room to run around, a small pasture with goats the kids can pet and feed (but they are quiet and do not smell), and beautiful grounds. The place is run by a really nice woman who has lived there all her life, and is following her parents running the business. We just went for a long weekend over spring break. The cabins are really comfortable, two bedroom, nice little kitchen, fully stocked with plates/pans/silverwear. You can see the railroad museum from the hill on their property...it is very close. Right near downtown Strasberg, so not too far to Dutch Wonderland. Also there is a nice farm very nearby called Verdant View farm. We visited and you can help milk the cows, feed a baby calf, and see other animals.
Anyway we had a great time and can't wait to go back when our kids can swim in the pond.