An update- Well we decided on the Doula that's away for a week until 12 days before our EDD.
Really clicked with her. We are now in the process of thinking through the backup doula options.
Have done the calmbirth course too. So even if we birth in the week our Doula is away, with all the reading etc we've been doing, we'll be fine.
It's just hard not knowing if we'll need the backup or not!