What should I do to prepare car for a month in storage in a climate controlled

I would say for a month, it probably requires very little. I'd be a little concerned about the battery holding its state of charge -- I'd say it would be best to remove the negative battery terminal upon storing the vehicle. Keep in mind that you will lose radio presets, and the engine's processor may lose it's adaptive strategy, and that is something you'll have to deal with upon your return.