[Katie]

The main reason is that if I do so, then I would NOT be a true Two Spirit.  That I would have to go full time femme. 

Says who!???

seriously, who said that? because it`s certainly NOT true at all! neither part.
Your spirit is the untouchable, immortal aspect of your being, your physicality has Zero influence upon it.
Why would you have to live full time femme? you can live anyway you please! unless it`s a condition of having an orchi, in which case it`s a bit late once they`ve done it and you go back to living as male or whatever! LOL
they can`t MAKE YOU dress in femme clothes. yes you might have to jump through some hoops before the orchi, but when it`s done... it`s tuff titties for them if you go back to how you are now.

Don`t be so quick to give up on your own agency