I'd go early /mid Nov- I guestimated you'd be around 30-32 weeks?? this way you're not too big to enjoy it and you avoid the mad Chrissy period.

Nae x
This is when I had mine too. I was tired and it was pretty sedate. I couldn't bear thinking of doing it now at 35 weeks, I would just get to tired to enjoy it properly.

But there are no rules so go with whatever you feel like