I am not sure why someone asking a legitimate question gets bashed by those who have on interest in the OP's question or needs. If you want to dry camp in the mountains and watch the grass grow you certainly are welcome to do that. However, your message is of no value here. Even those (like myself) who believe you should be providing your own internet connection don't really provide the information the OP was looking for.
WiFi is bad because the internet connection is bad. That's a reality will always be true when too many people are trying to share the same connection. If you live in a high rise apartment complex, everyone is going to pay (let's say Time Warner) for their own level of service. That means that 200 people in the building of 200 users will each be paying full price. In a campground scenario the park owner is going to pay for bandwidth that will provide a reasonable level of service for the least number or campers he expects over the course of the year. When the snowbirds (Winterbirds) show up there is absolutely zero chance that this level will serve the larger population. That, of course, assumes that a reasonable level of service is even available. Since most "campers" like to get outside the city (where the internet service is) the campground may simply not have any kind of a reasonable backbone available to them. The last problem I will discuss here is that you need a knowledgeable person to operate and troubleshoot a network. That also takes time and money to deal with when the reality is that everyone wants it all to be free, unlimited and just as fast as home. It's simply never going to happen in our lifetime.