Over the past 12 years, I've used TENGONET (paid) at a few campgrounds and never had a problem....even when paying my bills.
For the past few years, I have a VERIZON Mi-Fi and use that. Sometimes the Mi-Fi hits a "dead spot" (like parts of Texas) where I used (twice) the KOA connection...and even then, no problems.
Am I lucky?
My laptop has CCleaner, Malwarebytes and Norton. I'm presuming these 3 do the protection? I am under the impression that my bank site is encrypted.