Craig 123 has the best solution, we had 12 or so pairs in each suitcase, all small kids size......customs lady asked what are these for??..we told her each year we go around seeing kids that need shoes we give them away.....
we asked her if she had a child, she said yes, we told pick a pair or two out...she did...we went on through

50 pairs...they could call you a "profiteer".........lotsa questions then.......