It's a bit annoying about the 3am earliest Dartford crossing as if we leave Potters Bar at last orders (11pm?) we're likely to be sitting about for at least an hour. It would also be nice to get to Reculver castle to watch the sunrise which will be around 6am in late August, it's 55 miles or so from Dartford though so I think we'd struggle even if we were all across the river by 3.30am.
Suggested route from Dartford > Ramsgate is here: https://www.komoot.com/tour/36587783
It's a bit annoying about the 3am earliest Dartford crossing as if we leave Potters Bar at last orders (11pm?) we're likely to be sitting about for at least an hour. It would also be nice to get to Reculver castle to watch the sunrise which will be around 6am in late August, it's 55 miles or so from Dartford though so I think we'd struggle even if we were all across the river by 3.30am.