I think each family is a little different.
Before my wife and I had a son, I was just getting into shooting the year before. I basically shot almost every weekend with my friends at mostly IDPA at the time.
Last year I shot every IDPA major in the area and then as many matches in the "other" game as I could fit into my self-imposed rules. This year, its all USPSA.
Once we had our son, I imposed a rule of "every other weekend I'll do a match", and that seems to work out somewhat, but other times it is pushing it too far. Some of these matches can run long with long delays, etc.. and some places don't even have cell coverage.
I may consider cutting this back even more in the future to one match every 3 weeks or something..
I'm lucky to get to my home range for an hour or two to blast away at some plate racks or chrono some rounds maybe 4 times a year..
When a mom is at home every day taking care of kid(s), and then one of the two weekend days you want to say "see ya later, I'm going to the range to screw off ALL day", it can be stressful to mom. It can help to be extra nice all the time, show them appreciation, help out everywhere.
With all these restrictions, the best way I feel to keep up the skills is dryfire. I think Bill is probably a good example of this, although I'm not too familiar with his exact training regimen. I know dryfire is important and needed to keep your skills up and progress, but it can be hard to get the motivation.
In the end I think it will be different for each family, and you need to figure out how to properly balance the things that matter to you.