It appears this is open to our Webelos II scouts with a host troop only.

Excerpt:

MISSION IMPOSSIBLE CAMPOREE (October 27 & 28)
The camporee begins Saturday afternoon and the activities start in the evening after dark. Patrols
are given orders to accomplish several night events during the course of the evening. An adult
accompanies each patrol for safety purposes. Patrols are awarded points based on their
performance in achieving each event. A cracker barrel is offered as part of the events.
The theme is designed to appeal to the sense of fun, adventure, and imagination so active in boys.
In addition, the program helps to put into practice Scouting skills, team building, personal
reflection, physical agility, and resourcefulness. Second year Webelos are invited to attend with
a host Troop.
Mission Impossible requires approximately 30- 35 staff members. These are volunteers
from each unit attending and all units are expected to assist with the camporee in order
for it to be safe and successful. Unit involvement will enhance the experience for the
boys and make it fun for all of us. Early registration is requested to provide adequate
planning, staff meetings, and materials. Registration fee is $10 per Scout and Adult. This
fee includes a specially designed Camporee patch, insurance, all program supplies, and
awards.