There is now a hitch lock on the trailer.  The keys to the hitch lock are temporarily in a plastic bag inside a small box in the trailer until Tim and Neil get shelving installed.  Then we can have a closed hook holding the keys.  There is also a padlock on the doors now, and the combination is set to "9845," our house number.  That way, if anyone needs to get the combination and isn't online, they can call directory assistance for our house number.  Also, inside the plastic bag are the directions for changing the combination for the lock if we need to do so in the future, along with the "reset tool" (a small key) needed to do so.  In order to open the lock, after putting in the combination, you first push in on the shackle and then pull.  To re-lock it, you scramble the wheels before shutting the shackle.