Favorite thing: Though it is the tallest waterfall at Ricketts Glen, I think the best place to try to get in the water is under the Ganoga fall. There are flat rocks and the creek is shallow at this spot. It's never completely recommended to get into the water, nor completely safe. However, it does get hot and if you are hiking UP the Ganoga Glen part of the trail, the part from the previous waterfall to the Ganoga fall is pretty rough and you might want to cool off. The water is NOT warm and standing well away from the actually fall will still provide you with a nice mist from the water thundering down 94'
Try out some of the other hikes! Maybe not on the same day, but if you revisit, just do a portion of the trail and then get on some of the other ones. They have a lot to offer in the way of scenery and few people take them. I had 2 of the trails entirely to myself--it was really nice, actually. I sat down and at a lunch with absolutely no people around. These trails, for the most part aren't as difficult as the Falls Trail, either.
Some of the other hikes are:
Mountain Springs 4 miles, moderate hiking. They go down to the "forgotten falls", Bowman's Creek and the Mountain Springs.
Grand View1.9 miles, moderate hiking.
Takes you to the highest point on Red Rock Mountain and in the spring and fall, you can go up to the fire tower and get an amazing view of the valley.
Old Bulldozer Road Trail: 2.9 miles, difficult. This is the one I did after the Falls Trail. The first mile or so is hard, the rest is easy. It's not to well maintained, but very serene. I laid on a large rock for awhile watching deer and pheasant and listening to all of the other sounds...
Those are just a few of them...
If possible, try to go in early June. At that point, we usually haven't gone into a drought warning, so the waterfalls are amazing. Also, the park isn't too annoyingly crowded at this time either...and the mountain laurel is blooming!! (that's our state flower, by the way...) The weather is usually wonderful in June, though it was 100 degrees today--that's not a common thing before summer!
There is one major annoyance with going in the spring, which I'll address in a warnings tip.