How Long Would You Go On Vacation Without Your Kids? [POLL]

My husband and I were planning a seven day rafting trip and just recently decied to cancel our trip because we didn't want to leave our children for that long. I have been told by other parents that the only reason I feel this way is because my kids are little. Apparently, when you kids become teenagers you NEED time away from them in order to survive.

Even though we have canceled our trip my husband and I would still like to take some sort of vacation without our kids, but we are unsure how many days is the perfect amount of time to be away from our kids.