I agree to stop "insisting " on bedtime and just chill out over it.
In my opinion, 7.30pm, even 8.30pm, on holidays or during weekends, is a very early time to be trying to get active and healthy kids your age to bed.
we are some of the lucky ones who don't have drama's at bedtime and never have.
But we've never forced our kids to go to bed either. We have never made drama out of it and we have always stuck to a series of events (if you want to call it a routine, you can, but it's more just a regular series of events that have always been followed pretty much)
We have dinner, we have a bit of time to chill out. There is no rough play and decreased noise overall in the house at this time. A lot of the time, TV is off and we parents are reading or spending time on the net or just quietly doing something, so the kids have been in that environmental mindset.
Then they have a bath. Usually I say "hey girls, it's 7.30, time to think about a bath??" and leave it up to them...these days, they generally know when 7 to 7.30pm is and if they don't start it themselves, they are okay togo with the reminder adn cue.
They love to watch certain shows etc which end at 7.30pm, so that's a good cue anyway. They aren't allowed to watch anything too stimuating and definately NOTHING like computer games or such...
Then they have a bath (or shower) I let them stay as long as they like. They play, they relax...wahtever. Then they do their teeth and 90% of the time, it's straight to bed then. Sometimes they are too tired for a story, mostly we do have a story. But again, nothing too stimulating or "exciting' we do calm and "nice" stories.
We talk about any concerns they might have that haven't already been addressed before then...then it's goodnight and light goes out and they go to sleep.
WE've pretty much followed an age appropriate version of that since birth with both kids.
but IF they aren't tired, esp with the older one, she isnt' forced to go to bed if she doesn't want to and isn't tired. She is allowed to read with us, cuddle on couch or lie quietly in the bed beside me whilst i read or "work"

(sshhhhh..don't tell!!) on the computer.
Basically, in this house, ALL loud, boisterous and "rev up" activity stops at dinner time. Always has. Hb and I would rather record shows and watch later if needbe, then have the kids trying to watch an "adult" rated show with us or being kept awake with noise.
During school time, bedtime is now around 8 - 9pm (kids are going on 7 and 8 yrs, just finished grade 1 and 2) and during holidays and weekends? We don't have any actual bedtime. They go when they are tired. But like tonight, it's usually around 8-9pm anyway. It's enver an issue.
Good luck,
Tamm