The problem is not the catalytic converter. The rotten egg smell out the exhaust is the catalytic converter working doing its job. If the catalytic converter was at fault, then the rear oxygen sensor would set the "check engine" light. The smell is usually caused from gasoline brand. It can take five fill ups to clean out the smell from a catalytic converter. I would run the gas tank down to just under 1/4, switch the brand and gasoline grade to a higher octane. The higher the octane the hotter and cleaner the gas burns. The premium grade will not harm the engine or drive the computer crazy.
Definitely Big Bear. Its much cooler up there and there are plenty of resorts and campgrounds. Big Bear Resort and Yacht Club is a great place and the price is not as high as you would think with a name like that lol.