Where are the contests in the us and do they all have yoyo booths?
there is a section on the forum about where contest are hosted. What region are you looking for and most of the time YYE shows up with tons of yoyos to test
Midwest
Midwest Regional Yoyo Contest:
Note that most of the info except for the 2013 date is all from the 2012 contest.
There traditionally are no vendors at this. It could change.