Feed the video and audio out of your camera into a RF convertor. Take the output of the convertor, if needed, and feed into a distribution amp and then you can run RG59 or RG60 cables several hundred feet to the rooms you need, which would carry the video and audio signal muxed. At that point you could feed it into a DVD/VCR combo. This would give you the outputs you need to feed to the projector, and at the same time give you the capability to play a DVD without having to swap cables.
He asked for a WIRELESS solution.