In answer to your question about a battery disconnect switch -
Follow the red positive lead coming off the battery. There should be a disconnect switch fairly close to the battery - probably one that you twist from 'on' to 'off'.
For short term storage (less then 3-4 months) I would just turn the switch to 'off' or disconnect the positive battery cable (hook it back up BEFORE you plug in to tow vehicle). The battery won't be hurt for that short timeframe. I would pull the battery and put on a maintenance type charger over the winter.