Our family went up and rented Guest House 1. The house was great! It had everything we needed in the kitchen, a grill out front, picnic tables, fire ring, plenty of sleeping for our extended family. However, the second we walked out the door, you had at least 5 ticks on you. If you spent any extended amount of time outside, there were 20+. It was terrible, as my sister was pregnant and didn't want to risk it and we had a 1, 2, and 4 year old. We spent a large part of the weekend searching each other like primates and picking bugs off. Since the weather wasn't the best, we didn't feel as bad missing out on being outside.
We DID have fun doing some of the activities like hunting for insects/animals in the pond with the ranger, hiking to the ranger tower, playing at the playground, and trying to catch butterflies with the ranger. That being said, we have had several conversations with others who have also said it was the worst tick experience they have ever had and will not choose to go back again.