Find a retreat facility that is in need of some volunteer work. I know of some that will lower their rates if you will come and donate the labor. This is something that can help build your group and add a sense of ownership to a facility. If you live anywhere near Arkansas, check out www.gbgm-umc.org/outdoorministries for access to 3 campgrounds and a retreat facility. I did a work retreat at Mt Eagle last spring and we got to cut a new hiking trail that was a prayer walk. Those of us that went really bonded as we got down and dirty moving downed trees, raking, building steps and benches, etc. This can be great for a small group. Make sure that you find out what equipment you need to bring for the project and let your participants know what will be expected of them.