Man, I really like that panel mount 2 pin connector! I think I'll use that one too! What a great idea. The idea of quick disconnect mounted to the bags is neat too, but may be problematic... I'm thinking simple is best.
In my ham radio hobby we use anderson power poles and the closest we get to what you suggested is
http://www.powerwerx.com/powerpole-a...lash-boot.html . Not nearly as practical.