I use Directv Now and am pretty happy with it. I signed up for their service when it came out so I get their GO BIG package (100+ channels) for $36. and change. That was a introductory price and am grandfathered in as long as I keep the service. It works well in the RV BUT you need good phone service in addition to the unlimited data to be able to use it. I think most RV parks wifi will not handle it streaming as most frown on streaming on their park wifi.
Not sure how your Sprint service is where you camp but most people prefer either ATT or Verizon for decent service out in the places away from the interstates and major ciities where most campgrounds are.
If you have Direct satellite service you can probably get a reduced rate on the Directv Now service. Directv NOw has a 7 day test period that is free. Since you have satellite you may want to think about ATT phone plan since they are ALL ATT owned companies. If you have ATT cell service the data used to bring in Directv Now is NOT counted against your data useage. That's a big plus
All you need to get Directv Now into your tv is one of the following connected to a HDMI input on your TV
Amazon fire stick (or Fire TV box)
Apple TV box
Chromecast
Roku
Sometimes they offer a free device to hook up I for a Fire Stick free think maybe now they are offering ROKU.
You have to be able to cast from your phone to the device that is connected to your TV. If you have a hotspot with unlimted data then the wifi from the hotspot need to connect to the wifi of the tv device.
web site is
www.directvnow.com (only on "t" in web address)
phones
www.att.com
not affiliated with any of these companies