How to get dad to bed at a reasonable time?

My 92yr old, dementia father, likes to watch TV, a lot. I try to distract but I run out of ways. The problem is that he likes to watch his country shows but the play on a loop long into the hours. When I tell him he's already watched it 2-3 times and it's time to go to bed, he gets aggravated and mad and tells me to go to bed. I can't sleep when he's up and the TV is on, loud.
I've thought about fibbing and say we have to get up early, but then I get tongue tied...he stays up late, sleeps in late. I really want to get him on a better schedule. I'm his caregiver and I'm usually up early. Any suggestions, anyone deal with this?
We're going to Florida in a couple weeks, I hope I can get him into a program that will occupy him better than tv. He naps during the day and I try to keep him up but it's hard, we're out in the country, isolated and alone. I'll be glad to be back in my home for the winter in Florida.