We use our Verizon Jet Pack as our secure  connection, i up our data plan to unlimited data, thus i can stream movies, or use as much internet as we want..   thinking about upgrading the one we have, a newer, faster one has come out..

Our experience is that RV park internet connections are not secure. Every one we have used actually has a message stating something to the effect of 'this connection is not secure, others can see what you are doing, continue?' We say Yes when we are just browsing. Should we need to do any type of banking,  or other confidential stuff, we use our cell phone Hotspot to connect. Using your own equipment is the only way to be secure.

RV parks usually do NOT have secure wifi.  BUT, using a vpn will secure your connection. You might also look at the Winegard connect.  I have one and we use it not only for security (you set up your own secure wifi password that the parks internet goes through) but the 'connect' improves the signal and we pull in weaker locations more easily.  This was the first generation 'connect' but it works fine.  I also take it along when staying in motels (fits in a briefcase) as motels are notorious for getting hacked.  With a VPN and/or a Winegard Connect we feel quite safe in our internet work.