Usually we read about coverage in offices (indoor) or streets, squares, metro stations (outdoor). Those sites are glass, concrete and steel, 802.11n and MIMO works fine there. I would like to hear experience on campings area, trees and bushes, high and low vegetation. And there are 3-5000 guests in one square kilometer area, with 1-2000 smartphones, few hundreds tablets and notebooks. Some of them in tents, but more and more in campers (aluminium) In peek, 300-500 concurent active users, smartphones and tablets with WiFi switched on even when not active.
