Hi Folks, really for anyone recently doing this sort of trip. We are both UK Citizens, we are flying into Canada - doing the rockies, down to US to do Yellowstone - then back to Vancouver and flying back to UK so we will be dipping in and out of the US. As I understand it we don't need an ESTA but I am (sorry a little naive here) not sure what a 'machine readable' passport means. I have a microchip in mine but my husband doesn't as his was before this was included. Will he therefore need an ESTA but I won't? We both have bar codes on them which I am assuming is the machine checkable bit but just checking it doesn't just mean the chipped ones.
I wonder sometimes if border entries and tourist offices should pay people who answer Trip Advisor enquiries as it is such a useful forum and probably saves them lots of calls !!