I gave up depending on the campground WIFI setups a long time ago... We have good luck with our VERIZON MIFI unit that produces a 'secure' hot spot for up to five of our devices... I only use the internet to check in with the kids, pay a few bills and do some very limited browsing of the internet. the 3GB monthly plan is not big enough to do any downstreaming. I think a typical movie of HDTV program will use around 1GB per hour of data... Mine is a grandfathered older unit and only has a 3GB monthly data plan which is great for us to use.
Don't have to blend in with the other wifi crowd at all using the mifi unit... We are out around the patio fire pit playing with the tablets and all and folks will come up and ask how we are getting thru the camp ground wifi. Then I tell them we bring our own WIFI Hot Spot with us...
Verizon for us seems to have the best coverage area at the places we camp at most of the time...
My mifi unit sits in a Wilson Sleek Cradle which has an outside antenna. Works great for us everywhere we go to...
Roy Ken