Hello and welcome.
No, never been there. I shoot at Kingsbury (also DNR). It's about 10 minutes farther from Hebron than JP is. Looks like 50 minutes according to mapquest.
I went to Kingsbury wednesday morning. They open at 9. I was there from 9-10 and was the only one shooting for most of the time.
Kingsbury is clean, has an RO, and has covered benches. rifle targets (benches) at 50 and 100 yds, pistol targets (standing shooting positions) 10, 15, 25 yds.
DNR rules: eyes & ears, no drawing from holster, no "rapid fire" can't touch or pack up guns during cease fire.
Sorry can't help with JP, but maybe we can get a little discussion going for you.