Theft and locking

After countless hours of work not to mention tons of money re-furbishing our baby, I am wondering how to lock it.



If we are camping somewhere and decide to leave the trailer with our tow vehicle-how can we lock it ? Should we lock the hitch ? Tires ?



Please, this isn't meant to be a question of should we lock it or how many trailer are stolen per year etc...we would just like to know how to lock it and where to get the lock.



Thanks ahead of time foe your help. Denise