I bet most of you wouldn't want to pay for these connections you're requesting / expecting. Fact is most service goes unused and then everyone wants to netflix or skype at the same time. To accommodate such would be incredibly costly. Especially given these places are rarely 100% occupied through out the year.
1 50mb pipe which is great service would run around $100 (corporate rates are higher) and would likely work for 3-5 sites depending on what exactly they were streaming at the same time.
You do the math. If you want service like that you need to buy your own modem and get an account with the local cable company. I don't think you can expect a camp ground to invest 7-10k a month in internet plus the infrastructure for the few months people happen to be there.