I always pack old unmentionables for that reason too Dixie, it's not worth the hassle bringing back socks with holes in them I should have thrown away some time ago.
Also if I am going to hot climates I usually only pack 2 pairs of socks one for "going out in" and one for the return flight - sandals all the way for the rest of the time
This might sound strange, but "fanny packs" (or bum bags in the UK) seldom get noted if worn under loose clothing especially when pushed round the back. I've seen some big bum bags on my travels (sorry but that just sounds rude, I apologise). Once you reach your destination they are perfectly comfortable being carried "messenger style" so you don't look like a throwback from the 80's.