Where can I look up voting guide for better bike infrastructure?
The closest thing I know of nationally is the League of American Bicyclists I Bike - I Vote page, but that is not going to really give you a clue about for whom you should vote. It's more a resource for issues before Congress that you could use to question candidates.

I don't know where Dana Point is, but I know many counties in CA have bicycle advocacy groups like the Los Angeles County Bicycle Coalition.  Here's a page with links to other CA Bike Advocacy Groups.  Your best bet is to contact your local group and talk to them about issues and recommendations. While you are at it, join, donate and become active. Like stated in this post on bicycling advocacy, the best way to be involved is to be active locally.