It may not be necessary to form your own community to purchase a dry-pack can sealer and bulk quantities of metal cans. If you live in the right area your local LDS church may have facilities they will allow you to use and perhaps even suitable food products they will sell you.
Most facilities will be located at one of the LDS Bishop's Storehouses located in various places around the country, but some churches also have their own local facilities. The easiest means of finding out is simply to ask the LDS church member you know. If they don't themselves know, or you don't know any Mormons then a little phone book research will be necessary. Find your nearest local Mormon church and ask about speaking with the local Bishop of the Ward or Relief Society president. Either one of those two individuals will be able to give you the information you seek.
IMPORTANT NOTE: Please do keep in mind that the individuals responsible for the family canneries are all volunteers with demands on their time from many areas. Be courteous when speaking with them and, if there are facilities for use, flexible in making arrangements to use them. You will, of course, have to pay for the supplies that you use, cans and lids at the least, and any food products you get from them.
Any food products you want to have sealed in cans will need to fall within their guidelines of suitability for that type of packaging. This is for reasons of spoilage control since many types of foods just aren't suitable for just sealing in a container without further processing. If you purchase food products from them, they will already be within those guidelines.
I've corresponded with many LDS members and have even contacted the LDS headquarters in Salt Lake City to get the official word. Keeping in mind that not every area may have facilities for use and that the family canneries are run by volunteers, they are quite earnest about allowing non-church members to use their facilities. It's worth investigating.