Previous studies concerning camps have examined the effect of camps on the development of campers. The studies focused not only on campers but also on camp counselors, especially the group leader. The current studies examined the effect of the experience of the camp counselor in direct interaction with campers on the camp counselor's self growth feelings. The first of the two related studies developed a multi-factor scale for use in quantifying the camp counselor's self growth feelings and assessed the reliability of each factor in quantifying these feelings. The factor analysis confirmed the reliability of the following four factors for quantifying group activity management skills: “planning”, “providing guidance”, “assertiveness,” and “facilitating cooperation”. Cronbach's alpha indicated internal consistency (where alpha equals .89 for “planning”, .90 for “providing guidance”, .86 for “assertiveness”, and .93 for “facilitating cooperation”). The second study examined the effect of the experiences of the camp counselor on how the camp counselor of high school student rated the camp counselor's self growth feelings. The results show the experienced group that participated in camp activities as camp counselor rated the four factors significantly higher than the control group that do not participated in camp activities. These results suggest that as camp counselors gain experience in interacting with campers, their self growth feelings will improve.