I think I have emergency supplies for every possibility... but how can I know if it's enough?

I can't take too much, because the more I take the more likely it is that something will stop my ability to connect with the past... or future. I have a small, hidden bag. Basic foods, simple clothing, matches... I put my hand on the lever. Anything could happen if I pull it! Would the machine work? Would I end up lost in time? What if the machine didn't come with me?

Should I pull the lever? Or should I check the machine one more time? Or do something else?