Open camping areas

[ADV42]

Anyone on here know of any boondocking camping areas for big groups with large/long rigs in Sedona or Flagstaff that are close to trails? Having difficulty finding areas since we are not familiar with the area. We want to explore the trails in these areas, but not sure where we can camp or circle the wagons with 40' plus rigs. Any other suggestions welcome , traveling from So Cal area. Thanks!