Well, I reckon that I should update this. I'm back from the range now. I did end up going to Gibson's, after the recommendation from lordtrader. The first guy to talk to us was quite rude, but after that it was a lot of fun. The other guy that worked at the range was quite friendly. That was my first time to shoot out to 100 yards. I was able to keep most of them on the paper with iron sights. I reckon that I'm not too good, but hopefully I will get there with practice. For learning to get good at shooting, should I get a flattop receiver for the AR and a good scope, or should I keep practicing with the open sights? How tight of a group can I realisticly get with open sights at 100 yards? I imagine I'll have to practice quite a bit with the open sights for now, no matter what you guys say. I'm much too poor to be switching receivers and buying scopes.
Also, I fired a .30-06 for the first time. It was my minister's hunting rifle that he let me borrow. It hurt, but I think that I could get used to it. (I want a .308 though)
The guy a couple of lanes down from me was shooting some sort of a bolt gun with a bipod and scope. He said that he put about $1,500 into it. It looked like his groups were right around 1". NEAT!