Security guards stood a few feet away and the CTA's Green Line clacked in the background, but the trappings of city life didn't deter the dozens who had erected tents and roasted hot dogs around campfires on the lawn of Garfield Park Conservatory one recent weekend.Security guards stood a few feet away and the CTA's Green Line clacked in the background, but the trappings of city life didn't deter the dozens who had erected tents and roasted hot dogs around campfires on the lawn of Garfield Park Conservatory one recent weekend.