We usually do self catering, due to cost and 3 young kids who can be fussy eaters / all want to eat at different times.
Of all the things that can stress me out on holidays with young kids, having to cook and wash up isn’t really one of them.
I find it easier / less stressful than picking a restaurant everyone is happy with, at least someone not eating, and leaving feeling like we’ve just chucked money down the drain.
If it’s in the UK I tend to arrange a supermarket delivery to arrive just after we do.
I get easy stuff that I know people will eat. Lots of snacky things so people can eat as and when. Lots of nice breakfast stuff, so a few different cereals, Greek yoghurt, lots of fruit, lots of nice pastries.
Tiger bread and some nice soup for lunch. You can get tje nice chilled ones as opposed to canned.
we then have a few dinners out, but for dinners at home just oven pizzas, bolognese (sometimes take my own from home and just reheat), cold meat / salami etc, nice salad stuff.
A lot of places we stay have dishwashers, so cleaning up isn’t a problem.