Has anyone at EAA considered contacting AT&T. (or other local cell phone carriers), and requesting that they supply some extra Mobile Cell Phone access points, at Oshkosh, during the event.
With such a large event, and so many AT&T customers getting bad service at Oshkosh, it would help them retain existing customers, and would be a good promotional & PR move for them, to attarct new customers.
Same goes for Internet Access. It is not uncommon for Comcast to supply FREE cable Internet to large events, as part of their marketing.
However, like many things these days, if you don't ask, you will never know, if you could have got it.
Geoff