Even the dogs have specialties these days. Some are trained to find living people who are trapped or lost. Others are trained to follow blood or injury scents. The newest specialty is the Cadaver Search Dog, who will pass up any number of living people following the scent to a dead body. Not all searches end in rescues.
Many participants sleep on the campus.
This is the Tent City that is set up on the softball diamonds. A large parking lot is devoted to those who travel in RVs, trailers, vans, or just plain sleep in their cars. Some agencies have mobile command posts which are complete with shower, toilet, and sleeping facilities for an Incident Command Team, as well as providing operational areas for laying out maps and communications areas for radio operators. Many vehicles like that are converted from private RVs by the people who own them, while others are provided under the property forfeitures sections of some drug seizure laws. Most of the teams represented at SAR City are sponsored by law enforcement agencies, usually the Sheriffs Department, which gives them an 'in' when it comes to using seized vehicles.