Coming out of Winter storage (extreme)

[Goldseabreeze]

I am bringing my National Seabreeze LX 8311 2007 out of storage after an extremely cold winter in Northern British Columbia. Storage was in a building without heat. Had coach winterized. My concern is the batteries. They were disconneted as to storage procedures for the facility and national coach storage rules generally. Was not allowed to remove batteries because of storage rules. No charger was able to be applied to the batteries. Do any of you out there have any suggestions re start up after a 5 month dormant period? Bringing up the coach as to procedure of what to turn on and when would be helpful. Last year I needed to use the boost switch. I am asking as I am the last coach in last year and first out this year.