After EXTENSIVE troubleshooting (and some experienced guidance from a local expert) it was discovered that an inverter (installed in 1989) blew which provided power to the affected outlets. We decided to remove the inverter and hard wire that circuit....worked like a charm. The little power surge from the heater also destroyed the 1989 10' back up camera TV monitor (which I wanted to replace anyway). This little error in judgement cost me a few Benjamin's, but provided a valuable lesson. Thank you to everyone for their input, it really aided in my continued education!