You are going to help charity
Dotted around, especially in supermarket car parks, you can find many clothing donation bins for various good causes. Park at least 200m from your chosen clothing donation bin. Go to the bin, strip out of what you are wearing, and donate it. Make sure it is properly in there - underwear too if you are wearing it.
Doesn't it feel good to help others? Bask in that feeling for a moment - at least till you realise you are naked in public with no way to hide. Dash back to your car/stored clothes and know that any who saw you appreciated your sacrifice