One major suggestion for the WiFi next year:
Either ask those with iOS devices that use Photostream to turn it off, or block uploads to it, or both.
I didn't use my iPhone 4S much for photos during EF (mainly because my old 3 was the only unlocked phone I had and kept that with me instead), but I did take a couple of quick pics and a short 15 second video clip. Then when I connected it to someone's tethered cellular data service, we were taken aback for a bit at how 33MB was uploaded in a short time - and then I realized it was Apple's Photostream service.
In other words, when anyone has an iOS device that connects to a WiFi network, and you have Photostream turned on, it will attempt to upload all new photos to iCloud.
Now multiply that with all the people who have iOS devices at EF - then think about the very small amount of hotel bandwidth available.
Never was a problem last year because iOS 5 (which introduced iCloud and Photostream) wasn't available until after EF17.
But, definitely worth bearing in mind for future years.