I think one of the biggest issues around kids starting school is that a lot of parents just get hung up thinking about the 'covering' the out-of-school childcare, and not all the associated emotional stuff.
When kids are nursery/pre-school age it's actually (relatively..) easy to drop them off where YOU want them to go.
However as they get older their own preferences and personalities begin to come through and start making things more difficult ...
From my own experience:
- there MAY be an after schoolclub at your child's school, but they will likely want to go to football (elsewhere) with friend X instead.
- DS1 loves the holiday club, but DS2 HATES it, "Mummy - do I HAVE to go???"
- CMs may work less well if an older schoolchild is having to hang out with lots of babies/toddlers (my friend is having issues with her DS over this at the moment)
I also found the demands from the school grew enormously between Reception and Year3 :
- homework which (ideally) needs parental (rather than au pair) input
- Costumes for plays/ theme days etc
- music practice to be overseen
- parent meetings
-sports days
-harvest festival
- carol concert/ nativity
- "mummy can YOU come and do class reading - everyone else's Mummy does..."
- requests for playdates
- mums coffee mornings
- etc
-etc
And of course you can be firm and say 'no you have to go to X,Y &Z' and sneak out of work/ feign illness/ take half days/ work from home/ juggle with DH to make it all happen, but after a while it may all get a bit too complicated, a bit too stressful, and rather heart-breaking, with a sense that you are doing neither thing (work/parenting) well.
So you leave/ go part-time/ freelance.
I've seen it again & again I'm afraid.
I say to all my friends with pre-school children, "by all means have a plan, but be ready to change it, when you see how you feel"