Each 12v port is limited to 3A, but the whole shebang is limited to 10A. AA+ DC input expects around 5A but i have mine hooked to 12v 10A, although I haven't seen it draw more than 5A. It's usually sitting around 3-4.5A. I power 2600MM Pro, 290MM Mini, EAF, EFW and dew heater at 100% (for 90mm scope) with AA+ DC ports. My mount is directly connected to power supply.
You shoud be able to run camera cooling, mount and dew heater.