Rereading this thread after being in the PNW visiting family on the solstice...yeah, think it's doable (1000+ miles in 'daylight')
Now, gotta take some liberties here - think that civil twilight might be cutting things close, but could certainly be done within the constraints of nautical twilight. Yeah, the area from 4 to 10 might be a bit sporty at times, but that's where you've gotten a bit ahead of time between 1 and 4, for example.
Further reading on all things of this nature can be found at https://timeanddate.com
Now, gotta take some liberties here - think that civil twilight might be cutting things close, but could certainly be done within the constraints of nautical twilight. Yeah, the area from 4 to 10 might be a bit sporty at times, but that's where you've gotten a bit ahead of time between 1 and 4, for example.
Further reading on all things of this nature can be found at https://timeanddate.com