Recently spent a couple of nites here "camping" in one of the 14 cabins in the park. The park is at about 4000 feet elevation and is a very nice park as others have mentioned. Cabins can be easily rented on the William Heise website and cost about $60/nite. We stayed in one of the newer cabins. They are quite nice though primitive in the sense that there are only bunks for sleeping (no bedding, bring your own) and tables and chairs. Midnight walks to the restrooms are a keen reminder that you're closer to camping than a comfortable stay in a cabin. The cabins are heated by a propane stove, similar to a typical wood burning stove but burning propane through faux logs. It was more than sufficient to heat the small cabin, even as the temperature outside dropped below freezing. There's no cooking within the cabin and you need to cook outside. Though we did bring a hot water heater for making coffee, hot cocoa, etc. There are several electrical outlets in the cabin. Whilst the park advertises that the cabins have wi-fi, the signals are very weak and we could never connect in any event. We were told that the wi-fi was primarily for checking e-mail and that music and video streaming sites were blocked. Our plans to snuggle in our sleeping bags watching Netflix on our iPads were merely fantasy. :(
The park has nice trails for hiking, though they were pretty muddy during our visit and thus we didn't hike as much as we wanted. The park has a nice play structure near the entrance for young kids.
One nice aspect of the park is that you can drive to the town of Julian in about 10 minutes. We actually took a couple of our meals in Julian.
We plan to visit William Heise and camp in the cabins again!
If you own or manage William Heise County Park, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.