The problems with doing that.
Not all locations have the same cellular coverage not all towers have the same speed.. So it may work very well with one provider in one campground and **** either with a different provider or a different campground.
Most Cell Plans have data limits even if they claim to be UNLIMITED.. Example UNLIMITED but only the fist 50 Gig are wi-fi-able then we throttle or only the first 100 Gig are full speed then we may throttle you depending on tower load (Not the actual numbers but the actual plan I have)
On the other hande FMCA has "Tech Connect" a deal with sprint which is FULL SPEED AHEAD whatever the tower supports
Some places 20mBPS some 50, one spot 100+ and in some "NO signal".
OVER THE AIR TV. (your good old batwing, I used a SENSAR IV with Sensar PRO inside the rv) Any TV station within about 50 miles is Free.