Authorities say 24 of the 52 people aboard the bus were hurt in Thursday's accident, but none of the injuries appeared to be life-threatening.
Yuma County Sheriff's officials say two of the injured were flown to Phoenix-area hospitals from the crash site.
The others who were hurt were taken to a Yuma hospital and 16 were discharged by Thursday night.
Yuma Regional Medical Center officials say two people were discharged Friday while four other patients remained in good condition and one in fair condition.
Authorities say the injured all were between the ages of 27 and 82.