This is all great advice. lol @ the "run" comment. I was developing a gut feeling that some expectations reset would be necessary, now I"m convinced it is.
Currently, this campground has perhaps 'some' infrastructure in place. A series of 4 or 5 Linksys WRT54g units. I think a couple of them might be wired in, however, at least a couple of them are connected mesh or in some kind of repeater mode. They even have connectivity metrics on a dashboard that I have not seen but I suspect these were redone with that DD-WRT firmware or something, as I don't recall wrt54g's ever having these capabilities. One of them apparently even have a oversized antantee attached, I have no idea what, but it's way out of standard spec, yet it provides working WiFi for 100's of meters (I'm actually in Canada but used the ":mile" reference figuring most folks on here were in the US).
So:
Site survey: seems I'll have to do more than one. First, to see what's currently there, what poles and conduit for data/power already exist. Also to map out the desired client areas. Then back here to research what product line(s) will fit the need. I am not a fan of mixed-vendor solujtions but Meraki is too costly I'm fairly sure here, though if I could at least get an MX in there...
A second trip back after I've figured out what hardware we need. I could buy hardware for "training" purposes, and then sell/deploy if the proof of concept works. Dunno there, need to calculate my costs vs. gains if the owner says no thanks.
Would you charge for these site surveys? Seems like a hell of a lot of work for not a big invoice potentially (I'm a consultant). The client is an hour's drive in both directions.
Also, what are your thoughts on WiFi 5, 6, 6E here? 5 and 6Ghz are more future proof but shorter range...2.4Ghz has no future yet seems to be the only option for a wide area coverage, without going nuts with hardware costs.
Ok time to find my running shoes.....lol