At the Edge, individuals cannot book and stay like at a hotel or resort, and we only host one group at a time - so yes, in general it is a private experience.  Various team members of NEA stay on-site to help make the retreat happen.  The Lucier family who live on-site reserve the right to invite friends and family to stay and visit, and on these occasions they typically steer clear of groups but may be present at mealtimes.