We once went to a campground that asked us if we wanted internet access during our stay. They gave a username (site number) and a password. Then we got a lecture about not using it to watch movies, facebook and whole laundry list. She said they were on satellite internet and they had a certain amount of usage and if they went over, then they would be blocked for 24 hours and they used it for the business too. First of all, that sounded like a dumb business plan. And secondly, I told her no, that I was not going to be monitored like a child. Not that I woould of done any of that stuff, but when you start a long list of "do nots", then forget it. As others mentioned, you are not going to get internet like you do at home, at an RV Park. If you travel a good bit, then up your mobile plan and use it. We currently have 30GB of data on our plan. We are with AT&T and they offered us a special that they had for a short period. I think we had 5GB per phone before (3 phones) and then they doubled it from 15GB total to 30GB. I think it was an extra $25 or $30 a month. Not too shabby. Plus, they recently went with the roll over for the data. I think this month we started with somethign like 54GB. We are halfway through the billing cycle and have used less than 4GB of that. So we should be carrying over a good bit again.
Here's a hint. If you watch things on youtube, make sure you change the setting from HD. Watch it in a lower setting.. It will save bandwidth and will be faster for you.