Funny Gill! The trials and tribulations we need to go through, just to walk! 
PS- All of us at times probably would rather stay home, but we have to force ourselves out. That is the only way to recover I think. We can't let life pass us by for a whole year. Good for you for still going on your trip! Forward march (hobble)!
How long is your flight? You can always bring a pillow, if TSA will let you, and lay your leg on top of your travel companion to keep it up in the air after take off
I can walk at 25% WB no problem and no pain at all for the foot with the crutches. If you added it up, I probably only walk an hour a day around the house though. I feel like I should probably walk a lot more (even though it is the end of my first week). The only problem is my hands on the crutches get sore...but it's a lot better now that I got gel covers for them. I should wear my thick bike gloves, but often don't do it as I should, because they are a bit of a hassle to take on and off all the time, and I'm not very patient with things like that. You may want to ask you PT how much you should walk each day, once you can do that. Are you still waiting for PWB until that screw gets out or can you start Sat? Because crutch walking is sort of a pain, and often I want to do something fast, I still jump too much on the knee walker, especially because it has a basket and I carry things around easily with it, which you can't do with crutches. I think I will start using a backpack with the crutches because I don't want to slow down recovery due to this. I wish I could rub my leg and massage it. I worry how frozen it is going to be when they take this darned cast off! You are so lucky you can move your leg around a little, air it out, and massage it. Good luck with PT!! I am so excited for you to be able to start that! Please let us know what they have you do for the first appt.