Here's an email I sent to my parents & my MIL--we love them & have good relationships but they are all high maintenance in their own way. Thankfully they respect our wishes. We ended up letting my parens drive up 8 days postpartum, the day after Thanksgiving.
I can't believe it's already July! I figured it might be a good time
to throw some stuff out there re: showers, visiting us after the baby,
and the holiday.
Right after the baby is born, I think we will want to have some time
where it is just the 3 of us before John has to go back to dealing
with work, probably the first 10 days to 2 weeks. I know you guys
will be anxious to meet the baby, so we promise not to let it drag out
too long

Since the baby is due on 11/16, our plan for Thanksgiving is to make
no plan. It's likely to fall during the time when we are being alone
as a family, or I will be in labor or overdue and miserable. We just
think that the easiest thing for us is to opt out this year, to save
us stress and anxiety during what will be a crazy time.
Christmas--we will celebrate Christmas here, since it will still be
very soon after the birth. Family is more than welcome to join us!!
Teeny tiny reindeer hats and Christmas garb for Baby F are
optional, of course! Neil should start growing his Santa beard now

Hope this helps you figure out travel plans--