I have offered bootcamps both indoor and outdoor. Depending on the day and the theme of the class for my indoor classes I did a combination of battling ropes, kettlebells, bands, ropes, bodyweight exercises, stairs and running. I kept the same format for my outdoors except many of the days we were running form one location to another and perform some routines there or even on the way between locations. Hills and stairs were also a big part of the workouts. As far as music goes I only used it for my indoor classes. The number of participants I usually had in my classes were between 10 and 15 and the classes were offered 4-6 times per week.