Fun hikes and beautiful scenery
I camped at Turner Falls with my family and children, including a 3 year old and a 12 year old. We came during the winter season late October, and temperatures were comfortable during the day but cold at night. Renting a "shelter" gave us plenty of room to store our belongings and come inside during the cold winds. The top 1/2 of the walls are open with wood crosshatching across. We ended up tacking plastic across the openings to keep the wind out. I highly recommend doing that and bringing an electric heater if you want to sleep comfortably in the shelter. If you have a cold-weather tent with 20° rated sleeping bags, you could sleep in the tent grounds instead.
The scenery and hikes are beautiful and just challenging enough to keep everyone excited. Find the caves for a harder rock climbing experience. But even the most hard-to-reach caves were accessible for my 12 year old with some help. The Mountain Trail and Firebreak Trail are smoother for a great run or jog. Even though it was too cold for swimming, hiking along the water was still enjoyable. My biggest drawback was the broken glass everywhere. They do allow glass bottles on site, and there were bottles caps and shards of glass on several of the rocks we climbed. Be aware where you place your hands.
Bathrooms were not open so Porta-Potties were placed by the camp sites. They were clean and maintained. There was 1 main bathroom and shower house open on Level 1. It was clean and heated.