Yike about some of the tales of families! I'm very lucky that my DP and DPiL are all lovely. They also live at least 1.5 hours drive away.
Would be nice sometimes to have them closer, but means there's little/no risk of anyone turning up before we're ready to receive them.
TBH they've also all said that if we need them at any point then they'll come, otherwise they'll wait until we're ready before visiting and either stay with us (and muck in to keep the house running) if we can handle them or book into a nearby hotel if not.
Last time things kicked off weeks earlier than anyone was expecting anything and at about 5am. DD had arrived by 9:30am, so I just texted my Mum a picture of her after arrival.
She was at work at the time and was apparently bewildered that I'd sent her a random baby picture before it clicked.
Hopefully things will play out similar this time around and people can remain ignorant that I'm in labour at all until baby arrives!
I've put on my birth plan that hopefully DD1 will be at nursery or asleep when everything is happening, but if she happens to be around then she is permitted to see what's going on if she wants to. I'd rather she was involved and not made to feel unwelcome, and it helps that I know from last time that I tend to cope with labour just by going quiet and getting on with it.
We have friends nearby who will come if we need them to look after DD1 if I end up needing to transfer to hospital. And at worst DH will deal with DD1 and I'll work with the MW's to deal with DD2. 
Running on a tiny wardrobe here of 2 pairs of jeans, 2 sets of work clothes, 1 set of cotton trousers and a handful of tops. Meant that when we got caught out in the rain on Saturday and completely drenched, I had to change into my dressing gown when I got home as all my other clothes were in the wash! I'm making do with as few clothes as possible, as it's not worth buying any more for just a few months.
Are we starting off some lists soon of items acquired for LOs and what's being packed into hospital bags? :) I'm starting to get prepped here, but I'm sure I've forgotten things!