In our '04 Itasca Horizon 36GD with the C-7 330HP, we HAD two Sony analog TVs from the factory. Well, a few months ago, I decided it was time to come out of the dark ages and upgrade to new flat screen LED TVs. It was a bit of work, some cabinet restructuring and some re-wiring of certain components but, in the end, it was well worth every bit of effort.
We get some phenomenal pictures from over-the-air tv antenna. I mean, it's super clear. I never dreamed that both those new TVs would be so clear from over-the-air antenna. Heck, most of the time, the picture is better from over the air antenna than with our Kingdome satelite.
So, to the OP, yep, a new, LED or any other style of new TV will work just fine with whatever your campgrounds have to offer.
Scott