Cuba Workshares in March?

Potentially coming to Cuba in March for a journalism project, looking for potential cooperatives and/or Permaculture sites (in or around Havana preferred), that would trade room for work for a period of time (not looking to work full-time as the research will involve visiting other projects/coops as well as some lounge time on the beach and exploration time in the jungles! Any contacts? I have a PDC, and have taught permaculture, as well as holding a Masters Degree in Forestry and Sustainable Systems.

~ Frank