The resources available and any conditions attached. The technical and administrative services available. The mechanisms for recording and disseminating information. The level of support and resources to be made available. If it seems worth the risk, you may just have to get some action off the ground and work out the details as you go along.
Unrealistic expectations can only lead to disillusionment.
Be realistic about what can be achieved with the time and resources available. See also items in the A-Z on Action plans, Budgets for participation, Communication, Workshops. During this phase you will be running events, producing printed materials and using a range of methods. Give them tools to manage complexity don't, shield them from it. Divide the issues into bite-sized chunks.