Seems to me you’re in a great spot. Those look awesome and even if you need an extra 7-10 days, which you might, you will still have time to dry and then pack them up in Grove Bags before you go. I’m cutting my GG at 73-74 days of flower (80 of 12/12) this weekend.
Yup, what @Docnraq said, you’ll need to check back with the trichome pics once you get there. That will help get more precise. If the strain says 8-10 weeks in flower, checking with the microscope or jewelers loupe starting around 8 makes sense.