Is it normal to want to disappear, rather than endure the holidays?

i know everyone could say this...but it is to an extreme with me this year. i really don't know what to do. i usually have thanksgiving at my house. this year, i would just like to go away with the kids. the problem is they have two families they have to spend time with. my family is very dysfunctional. i don't speak to my dad. i rarely speak to my mother. my sisters and my brother and i, don't see each other much (at all)...and we all live within 5 to 15 minutes of each other. i am on my third marriage, my husband is divorced with one child. i have 2 children from my second marriage. my mother is not interested in her grand children (at all). i feel like when we get together, everyone has a great time. we try to outwit one another with our smartass comments, and laugh at each others expense until our stomachs hurt. why do family's have to get together once or twice a year and pretend everything is great? i would just rather not do it...we don't really know each other.