This piece in the Guardian today is getting quite a lot of attention on Twitter. I think some people have taken it a tad too seriously...(it's about checking your sourdough start into a hotel).
But it does bring me onto something pertinent, which is that people who I've got into sourdough (I'm a sourdough pusher) and have shared my starter with, have gone into a panic about going away.
It's really no big deal. If you go away on holiday:
Make sure your starter is in a big enough jar to cope with any expansion.
If you're worried about your start erupting (I never do, but I know some people do) then refresh it about 24hrs before you go away, not just as you leave. So you can keep an eye on it.
Keep the starter drier than usual so it's less frisky.
Put your starter in the fridge.
I have to say, I don't do anything different as I know my jar is big enough and I know how my starter behaves, but just to be extra cautious.
It'll be fine. When you come back, refresh it as normal once or twice before you bake.
That's all. Happy hols!