When Stanley is leaving, do the other boys at camp show guilt for their earlier actions towards him?

In Chapter 48 of Louis Sachar's Holes, Stanley and Zero see the other campers for the first time since their harrowing ordeal as Stanley's lawyers free Stanley from the camp and assure him that there will be an investigation into how it was being run and that Zero will be safe. Most of the boys from Group D—Armpit, Squid, Magnet, Zigzag and Twitch, but not X-Ray, who remains in the other room—express excitement that Stanley and Zero survived the desert, a feat they didn't believe to be possible. They are also congratulatory rather than resentful that Stanley is being released, which is a far cry from how they would have behaved when Stanley first arrived at camp, which implies a degree of unspoken remorse. The only one of the boys to explicitly express guilt and ask forgiveness, however, is Zigzag, who says, "Sorry about... you know." Stanley forgives him with a simple, "It's cool."