I have seen bubble wrap mess up paint on trains, and others here have mentioned it here over the years. I wrap each item with tissue paper (ideally archival / acid free) before the bubble wrap. If you did not do that, I would change it now. Your time frame is short, so you may get away with it. Plastic totes are excellent and silica gel is good. If you are storing track there are some rust preventatives to consider (The rust store/Frog). Again your time frame is short. I agree with others about looking more for climate control.
Bill