Your town planners and GIS people are handling a multitude of projects from school planning, roads, utility, parks, tax assessment, environmental planning, parks, and zoning to name a few.  You will find that your project will have to wait until they are available to work on it as they are as short staffed as other government departments. Although they are versed in community planning and general GIS techniques, they may not be emergency services experienced.  If so, they would be unfamiliar with first responder activities, often cannot ask the right questions, and cannot adequately represent the situation without extensive time to learn how first responders do their job. You’ll find that your project will be in hand faster and cost less than the time it takes for you to educate your planners about your needs.