Have you guys considered adding a minified url to a quick visual rundown of your policies to each of your posters (QR code)?
Here is an example of a great use of comic to convey quickly important information: http://theoatmeal.com/comics/tesla
This when combined with later on a plea for a musum for telsa in: http://theoatmeal.com/blog/tesla_museum . Actually succeeded in raising enough funds for the Tesla museum.
Memes is all good. But you must have substance and be able to communicate the core part of what you want to promote effectively. And a comic as shown above to convey policy information is a good visual medium to perform such action.
Heck you could probably implement a mascot or something through that as well. So try not to make dank memes too much... and instead focus on making poster images that encourages people to read PP policies.
Though we need some way to also communicate to those who don't use internet as much... so there should be another version of the above, but modified for paper medium. (E.g. pamphlet... or maybe as a set of business sized cards, where each card is a particular policy point, which would be useful in a info booth)