Interesting, Suzi. I took a glance at Smith's policies and while it seems to be very pro-trans on the surface, there's lots of room for discrimination. For example:
"Like most women's colleges, Smith expects that, to be eligible for review, a student's application and supporting documentation (transcripts, recommendations, etc.) will reflect her status as a woman."
In other words, if you have any recent documented history as male, forget it. Kinda rules almost every single one of us out, which is what happened very recently at Smith with Calliope Wong, a transgirl rejected because on her FAFSA form, she was still classed as male, despite everything else - recommendations, transcripts - identifying her as female. In other words, the school spitefully rejected her based upon a minor technicality on a document irrelevant to her gender or her academic ability.
All of which I find weird since you're utterly correct that such colleges are extremely sensitive to "L" issues. Just not "T" issues.
It's one of those issues that's ripe for activists to hammer away at, but for any MtF just looking for a good education without the drama, I'd suggest staying away from such institutions. There's little they can offer which can't be found at many a good college eager to accept diversity rather than stifle it.