Best Option for Internet Access Traveling Cross Country?

I use my smart phone as a hot spot. I have Verizon as my carrier. It has worked very well almost everywhere I have gone. You cannot rely on the wireless at campgrounds. They claim they have great wireless but then when you try and use it, it might as well not exist. Most of the time it is slow with frequent dropouts. I do my work remotely so I need to have a reliable connection and the Verizon hot spot on the phone has worked for me.