i think it comes down to what are you trying to accomplish with the DVD's? You either want to generate revenue for the site to cover costs or venture into other areas... or reinvest into making that next video better, quad copters, better equipment, etc... OR you should use the films to promote the site and drive more traffic to the site for more paid advertising and a larger user base.
Realistically how many DVD's are you selling? Is it even worth the overhead of creating the DVD's, jackets, etc? I personally dont even have a DVD player anymore, I stream. Perhaps toss em into itunes and youtube movies for digital sales?
My opinion would be to create short 3-5 min teaser videos of each event, etc... release them FREQUENTLY. Get tons of views, promote it using your facebook SCJB account, get people in the forum talking about it, excited for more meets, etc. Then release a year end video for purchase with full event coverage, maybe some product advertising and review, etc. Showcase a particular build, put a gopro on someone racing to cover the sport and promote the racing aspect of the site... i know you recently posted that your boat was down and out, maybe this is a good way to keep your interest in the sport and help promote it?
I personally really enjoy your videos, I think you have some awesome creativity and its cool to see how far you've progressed from a simple video, to a gopro on a stick, to quad coptering, etc. Not to mention your ability to edit them all together as well.