We're going through the same issue – we're planning a trip this fall for over a week. We found some college kids to stay at our house, but the more I think about it, the more a kennel seems like a better option. 2 of ours are also 1 1/2 and there is way too much to explain when being watched by someone who doesn't know them -- cover the leather couch, keep the bathroom doors closed, always make sure they go if it's wet out (which then requires: here's the best way to clean up accidents on the carpet), here's the routine when leaving, never never ever open the front door with the dogs loose.... With a kennel there are gates, gates and more gates -- no chance of bolting out the door when the pizza guy shows up! No worries about what did the destroy or mess on. Also all the other dogs may be a good distraction with you being gone.
The way I figure it, kennel owners love pets -- why else would they do it? They'll take good care of the critters and they'll be safe. I got a pretty good sense of a few kennels while making calls. Several even said, "oh, we have a few Basenji regulars here and they love it." One lady talked to me for 45 minutes about "this dog does this, and this one that, and...." talk about someone who loves dogs! We plan to try 1 or 2 out before hand, but I think I'd have more peace of mind knowing the house would be as we left it and they would be completely safe.