Select the guides. Brief the team indoors. Brief the guides and show them the route. The team plans while the guides dream up a language. Guides teach the team their language.
Guides lead the blindfolded team to the landing zone.
The team finds the ropes and builds the up-link. Brief the team on the exercise in their break-out room and let them start planning. Brief the guides apart from the team. Take them outside and show them the route you want them to use in guiding the blindfolded team and where the ropes are on the ground. They should guide the team to within a few feet of the ropes.