She cannot keep you from removing your belongings; however, if she has changed the locks on the cabin you will need to go to court in order to retrieve them, as you cannot damager her property. In order to collect rent, she will also need to take you to small claims court, at which point the judge will decide what rent, if any, is due. It is unlikely that you would owe any rent for the time where the cabin was inaccessible; I think most courts would think that a one mile hike qualifies as making a cabin uninhabitable.
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