The real question is "how STOL do you want to go?". I have landed on *fairly* rough grass into strips as short as 1250ft over 75ft trees, and 1000ft strips with very nice grass and excellent approaches. If your technique is good both in the air and on the ground, you can easily land and take off through 6" tall clumpy grass. You are *not* going do well in a CT on grossly unimproved strips full of gopher holes and foot tall grass, or a short gravel bar beside a river. But that's not what it's designed for. Here's my 1250ft landing over the trees onto a rough-ish grass surface, taken by my buddy on the ground: https://www.youtube.com/watch?v=YmlMeZyZm5M
I routinely fly with buddies who are flying a Legend Cub, a Maule, and a Cessna 185. The fact is I can land at about 80-85% of the places my friends routinely go. For the rest I just orbit safely above while they make their landings. No big deal. But if we are going someplace I smoke the Legend Cub, and can keep up with the 300hp Maule (which burns 17gph in cruise). As an all-around "does everything pretty well" airplane, I'd take the CT over the Legend or the Maule.
If you want to land a CT on short grass strips, there are some things you need to get comfortable with:
1) You have to be okay approaching with 30°-40° and landing SLOW. For a CTSW solo 50kt is the starting point, 48kt is better. In the video above my approach speed over the trees was 46kt. That's kind of the turning point; below that the airplane sinks *really* fast, at 44kt or so the nose starts to come down. The CT has a lot of power, so if you get too slow and start to sink more than you want to you can goose the throttle. You can also approach with a little bit of power in at the lower speed, and it will buy you a little more control authority and stability.
2) You have to slip. The CT is slippery and wants to go fast. If you have a short field and/or obstacles to get over, full flaps might not be enough. The CT slips great even with full flaps, though it will pick up speed in the slip if you don't hold the nose up. If you are not comfortable with slipping all the way to ground effect, you are going to leave some of the short field performance of the airplane on the table.
3) Respect the wind. Trying to land on any grass strip with even a knot or two tailwind, is a losing proposition and will make your landing much longer. Gusty or strong crosswinds should make you think carefully about what you're doing and if it's worth the risk. The CT is a handful in windy conditions anyway, adding a short field and/or rough grass is not going to help. And remember anyplace you get into you are going to have to get out of...
4) Full aft stick when taxiing and after touchdown -- the nose gear is the weak link here, protect it!