So instead, we spend one day a week on something 'big' (like going to Kennesaw), one day doing something small (like bowling or going to the library) and the rest is up in the air to do what we want. Usually, they spend 1 day playing video games and one day swimming. This all means that I have my kids home (to myself) majority of the day every day. It also means that they start getting on each other's nerves after a while. Of course, that's when I usually try to do the field trip. It gets them out and interested in something else, so that when they get home the next day, they're more willing to be together.
It's all a trade off. I get more time with my kids, but I have to redirect them every so often to keep them from strangling each other. They may get bored more quickly, but all they have to do is suggest an activity and we have the time to go do it. The end result is that it's all good.