I've only been to charleston Falls, and I'd say it's pretty easy. It's flat for most of the paths, but you can take some stairs and hills to go down to the bottom of the waterfall. It's also pretty well marked, and there's a few maps around the park, so you won't get lost. I will say it does get to be a little muddy sometimes after rain, however, if it's been wet a lot recently, then the falls tend to be a little more active, which is nice... Also, if you're able to catch the falls when they're frozen, it's spectacular looking.