I'm off on a long trip and need to store my Westy for 8 months. It will be stored in an unheated garage in the CA Sierra Nevada (mountains) @ 7,000 foot level, where the temperatures go down to below 0F. Recommendations on how to prepare the van? (From the recent thread on antifreeze, it would seem the standard 50-50 blend is adequate for this & lower temperatures?). Specifically, should I keep some level of background heat around the engine?; leave batteries on trickle or solar charge or completely remove & store them?; anything else to prepare?

Thanks,
Mike
'87 Westy