STOL kit? Not sure. They're great for getting in slow but, if I understand right, they don't really do anything for getting out. Right now, at sea level with temps around 60 with half tanks,
GroundLooper,
just some things to think about with the Stol kit,(I have the Sportsman because my conclusion from studying them, it was the best, and the difference in cost wasn't that much, and it didn't need the fences). And, occasionally there is an uninstalled, one for sale someone has bought and didn't install, so always a cheaper option if you aren't in any hurry.
If it will let you fly slower, only makes sense that you could take of slower which would mean taking off sooner/shorter.
Landing and taking off shorter means less abuse to the plane on rougher strips.
Obviously you are concerned about forced landings, consider the possability that the STOL kit will allow you to extend your glide giving you a better safety margin and possably more options for a safe place to land, and at a slower speed.
These are just some of the reasons I used to justify the purchase of somethng that I could have gotten by without, but am glad that I did go ahead and do.
Gary