I'm on vacation. I'm going to sleep. I can't sleep at home; I have to get up during the week at 6 am (for now at least, I'm hoping that will change next school year). I will, however, stay up until at least 1 am on vacation. I've done the 3 am EMH at MK before and do the 2 am ones. With me, it's partially that I'm 18 years old and there's scientific research that proves teens need more sleep and that naturally, their bodies want to sleep later and stay up later. The earliest you can convince me to get out of bed is 8 am, and you have to give me a valid reason to do so (No, "You're wasting your vacation away" is not a valid excuse). During the summer, we hit the pool in the mornings, so everyone else can go and I will get up when I feel like it, though I try to get down there by 11:30. In the winter, we get up at around 8:30 or 9, go get breakfast (sit down usually) and go in the parks. There's no rule that says mornings can't be leisurely.
To me, what time one chooses to get up on vacation is a personal preference. It's not a sign of laziness or not wanting to enjoy your vacation; it's your vacation and if you want to sleep in because there's nothing you HAVE to do, go ahead. If you want to get up early, just don't make me do it. And if you're tired and ready for bed, then go to bed.