I agree with Becca Franzen's recommendations. Some other readings that I use with students are The New Science of Teaching and Learning (Tokuhama-Espinosa, 2010), Condition Critical: Key Principles for Equitable and Inclusive Education (Lawrence-Brown and Sapon-Shevin, 2014), Leadership and Environmental Stewardship (Garst and White, 2012), 101 Tips for Supporting Campers with Autism (Tschetter, 2013), Resident Outdoor Environmental Education (Parry, 2013), and Groups, Troops, Clubs, and Classrooms (Ragsdale and Saylor, 2014). If you need specific chapters or pages, let me know. And since you're looking for ideas, I might as well put my own article on the list too. Might be related to themes 4 and 6. Memories as Useful Outcomes of Residential Outdoor Environmental Education (Liddicoat and Krasny, J Env Ed, Vol 45 (3), 2014). Glad you're updating these Guidelines. I would have never known how useful they could be if I hadn't taken a job with Becca Franzen!