Make a list of possible discussion topics. Consider, perhaps:
Abbey compared to Thoreau: "Solitude" vs. "Solitaire"
What is Eco-Defense? Does Abbey's argument make sense?
technology as a form of alienation from nature: Compare to Krakauer (p. 15)
Abbey stoning the rabbit: compare to Leopold shooting the wolves (pp. 41-42)
the "meaning(lessness)" of nature (pp. 44-45)
manhood found in working out in nature...(p. 50)
progress seen as insanity: compare this to Le Guin and/or Krakauer? (p. 58)
Abbey's polemic about Industrial Tourism? (automobiles as wheelchairs...)
The Frontier/Frontierism
The Moon-Eyed horse as a symbol of nature.