I get the urge to pee frequently when I am on a trip. It doesn't matter if I'm flying or on a road trip.
Most of the time when I get the urge and go into a rest room, my bladder isn't full at all. I'm sure it's just nerves but it drives me nuts! I take Atavan when I"m flying, (I'm not afraid to fly, but take one so I can sleep) but it still doesn't make any difference with my nerves. I still get the urge to pee.
I am very careful not to drink caffeine or alcoholic beverages either, but nothing seems to help.