... Looks like Plan B will be Grouse Mountain Although from this http://www.summitpost.org/grouse-mountain/523785 it looks like the trail isn't that clearly marked and there is a creek crossing (wise at this time of year...)?
There is no trail up. Hardly anyone is aware that is an interesting place, even the locals. Just look at the reaction to those posting comments on your link. In the summer people are only focused on those big snowy peaks nearby while by that time Grouse Mountain is dry. This is its green time of year. One just notes where on the topo map least gradient slopes are. Looks at the small sagebrush zone mountain, sees where that easier way is, and walks up while avoiding denser sagebrush and any steeper areas. As for McGee Creek, its a small drainage basin though snows will be melting keeping it lively. There won't be any log bridges or rock hops. You'd need to choose a wider spot in the flow where it is shallower, put on your shorts, and wade leisurely across. If you must hike a trail, take the one up to Lower Horton Lake.