I had no interest in going in the caves because I'm not certified to dive in an overhead environment yet, and don't want to do so without proper, quality training. I only wanted to spend more time in open water fine-tuning my buoyancy and trim because I haven't had the drysuit too long, and I have my cavern/intro class in a few months. I see your point (reference my confusion at what she was saying) now that I re-read my original post, and I'm sure the rule is in place because of insurance regulations, but it's stupid that you have to have a card that cost several hundred dollars to obtain just to be able to dive alone when you have the necessary equipment to be self-sufficient twice over and the water is barely deeper than a swimming pool.
This has been a frustration of mine since I started diving two years ago, I only have three other friends that dive, two of whom are only AOW as well and they almost never get wet anymore. The last one is willing to go regularly, as diving is his main hobby, but our schedules only mesh well enough that we get to go a few times a month at best. Most of my initial diving was done in areas I could get to by boat (all freshwater springs) and solo because I had no other choice (well, besides paying $80 to do one or two single tank dives on a boat after driving 2-3 hours minimum to get to their shop).
Only other place around here I can think of where I could do such a thing would be the Rainbow River, and I'd have to rent either a fishing boat or a canoe since I don't currently have one of my own...