State fair has a qualifying show-the PAS show. I know of one that's either in June or July that I'll be attending, but I'm sure you can find others online. I'm fairly certain there's one in each county.
Pam Graham runs shows near central Ohio, and I've heard that they are very nice from people who have showed there.
Delaware holds a New Vocations Charity show every summer toward the end of July or beginning of August, and there are beginner and advanced classes.
Marysville holds a hunter/jumper show on July 11 this year, and it has pretty good fence work and such that I've seen... [still showing Twende beginner jumping and higher flat (;] Although, I don't think these fences are as high as you are.
that's all I can think of off the top of my head. I'll let you know if I can come up with any more. (;
"Yes. Like 'Wendy'...With a T."