I've done that a couple of times, once on YARTs and once hitching.

In addition to YARTs, there is the Tuolumne Meadows Tours and Hikers Bus (http://www.yosemitepark.com/tuolumne-meadows-tour.aspx). They go from the TM store to WW daily picking up at the store at 2:15 p.m. I think they charge $7 and it runs daily until 9/14. That gives you a morning option and an afternoon one. YARTs is only $3 and the busses are quite comfortable.

Hitching it took ~1 min. to get a ride in late May before the busses were running last year.