Well, it's not really that we're -trying- to find Yukari... it's just that we happened to appear next to her house this time. We can't seem to influence where we end up when we enter Gensokyo via dreaming, and I don't think we've gone anywhere familiar that we can navigate from yet.
>Can we stay within a dream long enough to make a big trek from one area to, say, Eientei? Sumireko may still be there, in which case Renko would likely be around as well... or at least we'd get one out of two. Although, we probably don't know how to get -anywhere- from right here...