My wife and I ride a tandem and we have a Wike kid trailer for our 1.5 year old daughter. We would like to do all our grocery shopping by bike, but we're afraid of leaving the trailer out. I use a short U-lock to lock up our bike, (We live close to the university and I have had two bikes stolen in the last two years). The wheels on the trailer are a very easy quick release, i'm not concerned about somebody stealing the wheels because their specialized for the trailer, but I am nervous of running a cable through them to secure because the wheels do come off easily. Maybe just having a cable lock through them will be deterrent enough? How do you lock your trailers?