To give an update to this thread, I'll have to say that I found a local store with which I will continue to do business with because of friendly and helpful employees.
As a part of the house addition, we needed to pour some concrete floors and I needed to rent a troweling machine. The closest place was $50 per day, but only open until noon on Saturday, and if the unit is not back by then, you pay two more days rent (Sat & Sun) until you bring it back Monday. We were pouring a couple of pads on Friday afternoon and one on Saturday, and I wasn't sure I could get finished and get the unit back by noon.
I checked in a nearby town that I remembered seeing a rental store and called them. They had a machine for $40 per day, plus they are open until 6 PM on Saturday, so I knew I could get it back. I picked the unit up at noon on Friday and used it Friday evening with good results. We poured Saturday morning again and (of course) this concrete wouldn't set up, so I didn't get it done until about 12:30. We ended up getting the unit back to the store at about 1:30. However, the guys there just charged me for the $40 - even though the contract I signed said I would be liable for at least another half-day rental when I exceeded 24 hours. Of course, this made me happy and I will definately use them again.
Additionally, this store, which is about 12 miles from my house, is part of a True Value store that is really neat. It not only has all the normal hardware stuff, paint, pluming, electrical, etc. but also has fabric and crafts, household goods, and (maybe most importantly) a farm toy section. Just a quick look through the store and my wife and I made the determination that this was a pretty cool place to visit. We made a few purchases and were on our way, but we'll definately return.
Not that I really had any doubt, but there are still plenty of good local stores left - I will just keep trying.