Yes, you can use regular laundry detergent while camping. Just add the detergent to a sink or basin of water and submerge your dirty clothes in the soapy water. Swish the clothes around until they are covered with suds. Let the clothes soak for a few minutes, then scrub them with a washcloth or brush to loosen any dirt or stains. Rinse the clothes thoroughly in clean water and wring them out before hanging them up to dry.