Rik, thanks for the input. I agree that some areas of the POP appear to be asking for a lot of detail. That ties in with its use as a planning tool. By knowing the weather conditions expected, and the manufacturer's specifications (temperature ranges etc) for the bit of kit, you can make a realistic estimation of battery life etc.If nothing else yo may consider taking spare batteries, and adding that to the equipment list. The POP is designed to be flexible and can be altered to suit individual needs.