Opting out of family vacations

It's summertime and I'm dreading the invitation from my parents to go on the annual family holiday to the lake house. Let's face it the older you get the harder it is to go on vacation with your family. There was a time when it was all fun and games and I guess I just thought it would always be that way. There is something to say about free fun in the sun, but I just don't think it's worth the misery that I go through every single time.

Back in high school and college my brother never came on family vacations and I really resented him for it. I just thought he didn't love us and that he thought his life was so much more important. It took me 5 years, but I get it now.

First, I should clarify what I mean by family. This goes beyond my mom, dad and siblings. I'm talking mom, dad, little sister, older sister, brother-in-law, brother, sister in-law, 5 kids between the ages of 3 and 8, 2 black labs, and my sister's in-laws. Wow I'm tired just thinking about it. It's nonstop kids and nonstop chaos.

I have to sleep on a pullout couch and the kids are up at 6am which is also when they come into the living room to get me up. This just puts me in a bad mood and I mope around the lake house for the entire vacation, which of course isn't fun for me or my family.

In all honesty, I think I feel a little left out because I'm old enough to be married with kids, but I don't. But then again if I think I'm old enough why do I mope around like a little kid?

Can you relate to this? Is it wrong for me to opt out of family vacations until I have a family of my own or should I just suck it up and be a grownup about it?