Travel by land/sea is WAY more expensive and WAAAAAY more time-consuming than flying. If you can’t deal with a relatively short flight where there’s a chance that a child might make some noise, I’d recommend YOU take the land or sea route. Much more comfortable, please enjoy.
Congratulations! That’s a great time.
I really want to train for a long distance again, and heart rate training seems like the way to go, but I’m not sure I have the discipline.