You don’t need to be an artist or designer to help with graphics for flyer, posters, stickers, t-shirt, booklets.
Neither do you need to be a poet to come up with nice slogans or thoughtful blog entries.
Nor do you need to work in HollyBollyNollywood to make a video/documentary.
Print some posters (when they are ready) and hang them around, make sure the local bike-scene is aware of the event and leave some flyers on local activist places.
These are the free fonts used for BT publications: