It is just a fact of motherhood that you will not always be able to make it to the gym, or a class or even out for a run. However, keeping in mind that something is always better than nothing when it comes to exercise can keep you moving.
Why not tie a couple laundry bottles up with a rope, throw the rope over the swings and lift them while the kids are playing?

Years ago my mother in law said something like this to me in regard to my comment about not begin financially ready to start a family. It resounded with me then, who is every really financially ready to have kids after all? You just figure it out.

Now, I find that it applies to fitness and motherhood in so many situations. The kids grow so fast, if you wait on taking a trip till you have a whole week off or wait till you're done reorganizing the kitchen to stop and play a game...you'll just plain miss it.

Waiting till next year to do that half marathon? Thinking you might be stronger or healthier or lighter? Just do it! Make a plan with what you have in your life now and make it happen. Need to walk the distance instead of run or use a run/walk interval plan? Who are you trying to impress...sign up and get it done!

Enjoy the shorter trip, be ok with a disorganized kitchen, look forward to crossing the finish line.