Olly,
Now I've booked route 66 in october I know I'll have to renew my passport as its within 6 month of its expiry date.
That leads to another couple of questions :-
1. When renewing do you keep the same passport number ?
2. As I'm changing passport do I have to apply for a new ESTA even though my current one is still within its 2 year date ?
Thanks
Mick