Largest camp in US? Have you heard of skid row? I guess this is not necessarily a camp though - whatever. In either case,  vote for mass sleeping not mass camping. If there is a difference between Portland 3 years ago and now that is it. One produces privacy so tweakers can get high and f**, storage space for stolen goods, a semi-permanent place to trash, and is conducive to majority faction. The other just gives safety in numbers for a nights rest and maybe even a sense of community.