i work out of a 1 car garage, but i keep my bigger tools in a small uninsulated pole barn with 1 man door and 1 garage door. I keep wax on the tables and throw the beige cloth painters tarps over the big tools when not in use. I do try to avoid opening the garage door when there's a large temp difference interior to exterior such as on a late warm fall day when the machines are cold but the air is warm i have had water form on metal surfaces, even my tools in drawers such as in the sliding drawer tool chest will condensate. if you are just storing the tools it makes it easier as you just throw wax or oil on metal surfaces. I store my planes most of the time in a large wooden carpenter box with a arm & hammer moisture absorber in the bottom which i've never had any rust develop on anything in that box. i'd just protect as best as possible and it won't be a big issue for only 1 year.