I stopped wearing a kitchen garbage bag to totally prevent any leaking. What I found was once I just accepted the fact that yes I would have accidents with a full diaper on that would result in leaking and not to care if that happen a lot of my fears seemed to fade away. The resluts of this has been that now sitting down and feeling the urge and just letting go has become so much easier. When I am in the car now and feel the urge the flow just happens. I also found this is even making laying in bed and letting go easier too.
I know lots have posted about the mental changes that are needed to be able to let go in a diaper at anytime anywhere. It is very difficult to retrain I have found but mentally just accepting the fact that accidents will happen and that is just the nature of wearing diapers has helped me tremendously. Getting over the hurdle of not worrying or prehaps not caring really made, for me, a big difference.
I also found that wearing diapers at work, out shopping, etc - really no one notices or cares. I was afraid at first but as I started wearing in public and enjoying the feeling of peeing with others around me the fear went away and was replaced by pleasure and a desire to do it more often. This has now led me to just about wearing 24/7 and that has resulted in me feeling the urge to pee very strongly just as soon as i put on a diaper.
I hope my postings about my progess is not to boring for everyone.