I don't have a garage. I have been storing my 9' pontoon deflated, disassembled and stacked on a bench under a tarp. It is stored, except for the tarp, in pretty much the same configuration as it was shipped to me. I take it this is wrong for long time storage.
I expect the pontoon to last me a long time as my 6' kickboat fell apart and I had to have a new frame built. Should I partially inflate the bladders and hang them out of the weather by the D rings? I do have some room under the awning on the back porch. Maybe I should write Creek Co. and ask them too. Jim