Ive been to Clarks several times and have had trouble finding the "ideal" amount of flow. This gorge is so narrow and has such a small watershed that most of the time its bone dry and if you go after a rain its too dangerous to walk down the creek. Despite this, it may be my favorite glen due to its wild nature. As others have pointed out, this place is a bit dangerous and I would suggest bringing a rope. The first falls is climbable if you aren't afraid of sliding back into the plunge pool but I wouldn't really recommend doing this. If you do climb the lowest falls you will be immediately met with 2 more falls of similar height/difficulty level.
Heres part of the set of falls right above the lowest falls:
http://bremer.tumblr.com/post/90254579/clarks-glen-naples-nyI would recommend using the upper parking lot. From here you walk across the grassy field and find the trail at the other end of the field going into the woods. Follow this for a few hundred yards and look for a relatively gentle slope on your left. If you miss this there aren't any easier spots as others have pointed out. Heres a photo of where I'd recommend entering the glen:
http://bremer.tumblr.com/post/82196068/clarks-glen-naples-nyYou will find a half dozen 3'-6' cascades and falls before arriving at two 60+ ft. falls. Unfortunetely most hikers won't be comfortable climbing down these falls and I wouldn't advise trying unless you are really comfortable with your abilities. I have made it down but even in dry weather its dangerous.
I will let everyone explore the rest for themselves since thats the main attraction to gorge hiking in my opinion, but heres a taste of the upper creek:
http://bremer.tumblr.com/post/96384355/clarks-glen-naples-nyhttp://bremer.tumblr.com/post/78285023/clarks-glen-naples-nyFor comparison, the summer-time photo was taken the same day as these photos at tannery creek and grimes glen:
http://bremer.tumblr.com/post/80153742/tannery-creek-naples-nyhttp://bremer.tumblr.com/post/78977614/grimes-glen-naples-nyThis will give you a really good idea of what type of flow to expect at clarks glen. Given how difficult the hike is I would try to pick your day carefully.
"Now I see the Secret of the making of the best persons. It is to grow in the open air and to eat and sleep with the earth" - W. Whitman