Depends on where and when you want to watch "TV". If you won't be staying at campgrounds a lot, the TV is pretty useless unless you get a satellite dish as well. I have a TV and dish but frankly rarely use it. The kids are always on their mobile devices and I don't watch TV unless the weather is bad.
The issue with mobile devices is the cost of data. I have unlimited data so I don't worry too much. So short answer is the TV is a lot of hassle when these days everyone watches what they want on their own device. Seems the days of gathering 'round the TV are long gone.