BK - Cool project and congratulations on its success! I'm also new to Kickstarter and would still be interested in how your promotions went outside of the Kickstarter platform.
Also, can you recommend any art communities that are friendly towards posting Kickstarter projects? (I am working on this kickstarter project with a team of people, for a Public Art piece, but I would be interested in knowing some art groups for my personal art too).
The best thing I can recommend to reaching out to people is calling them or meeting them in person about your project as well as email. A lot of times emails get lost but I have managed to get some A-List celebrities to at least watch my film by calling and being persistent. Don't be rude mind you but check in and be engaging, make them laugh and you will get a lot farther. Sometimes all you're going to get is them passing the information along but that's better than nothing.