Plenty of us out there - looks like you're not too far from Cleveland. Over a half dozen of us did the Rev3 IM or half IM in Sandusky last Sept. Look at Athletes with the Betes group on Facebook - creator Tiffany is a T1 in Mentor, OH and has done several runs in Cleveland, Columbus and other places in OH. There are several people closer to the Youngstown area as well - John K. did the Burning River 100 last year. May also want to check out Glucomotive.org which is part of Insulindependence - they had over 100 diabetics/supporters in the Carlsbad marathon or half marathon last weekend. Glu - which I see to the right of my response - is also a good way to connect with other T1s and ask similar questions.
Regarding running fuels - I personally use Hammer gels most often, but always make sure to have a couple with me. Not sure what you're doing with insulin - but that's another question a lot of people have as they do longer distances. Good luck in Pittsburgh - hope to do that race one day. I think (through what I've been told by family members who are still in PA) that there at least 2 other T1s who will be running that race - but I don't have contact info for them.