I am from a family that EVERYONE goes to W.D.W. every year *sigh*..
Even my kids hate it now, of course they are now getting older.
The best advice I can give is making a 'backpack' to take along. If you have a baby/child that is perfect, you can take more stuff! But, I digress, put some wet-wipes, wash-cloths, hand sanitizer, trial size containers of, Tylenol, band-aids,q-tips, a 'shami' (awesome for drying off after those rides), etc. You get the picture? If you have a portable DVD player, hey it's the savior for air-ports, same as cd player, video games..
a HEALTHY size of Benedryl to slip your Mom *L*, & labelled MEDS!!!
Zip-lock bags are a MUST! Tres
Get the parents to chew nicorette gum!
Try to laugh at the situation, sometimes that helps. I mean if your Mom is getting on your nerves, just try to take it lightly, rise above, rise above :-)
Don't worry about planes, they are the safest known way to travel :)
It depends how bad your fear of flying is. There are specific phobias around that. And some courses that help people learn how to overcome that. If its just generalized anxiety I'd say preparing ahead would be the best thing. Understanding the schedule and what will happen and the like. What to expect. I remember I had a similar occurence. And I had psychotic symptoms at the time as well. I hadn't been on a plane since the events in 2001 and was flying to Spain right after the incidents there. I got on the plane and saw the air marshalls and was frankly terrified. And to summarize it, both flights back and forth, it was one of the nicest and most uneventful plane rides I ever had.
I'd say like myself the more you worry about what can go wrong the more anxiety you'll get. The more you plan for standard events the less you will. Start making a list of what to pack and the like and bring some snacks, enough of your prescriptions to last the trip. The more you concentrate on that the less unnerving the whole event will seem. As for family members let them cope with their own stress and issues. Its only fair.