Take a chance. If you travel for work or must take a trip for other reasons, go ahead and go alone. Yes, it can be a hassle to arrange childcare, pre-make dinners and all the rest of the stuff your family thinks just magically happens. Still, it's worth it. Traveling alone lets you remember who you were before you were the key cog in a family. You don't have to go to Australia to achieve this. They have wine in Pittsburgh, Toronto and Phoenix.
Anyone who has tried it will tell you that moving to a new place by yourself can be lonely. As obvious as this is, it was probably the scariest thing about moving to Madrid. The last year has been somewhat atypical and I've surrounded myself with wonderful people. Learning to enjoy time spent by myself was a top-five goal before leaving for this trip; to really push myself to accept the challenge of loneliness.