Hey William,
I hope the process is moving along with your tone poem. Revisiting music later can lead to a lot of "what the heck was I thinking?" moments, and trying to generate a score from midi is a pain in the best of times. I feel for ya!
Key signatures should simply be considered a courtesy...besides not providing them will keep people sharp (pun intended).
As for the Moonlit Tryst, it's still calming me while working on 4 simultaenous large-scale pieces, with Becky and me taking turns in the studio while the other listens to the avant-garde song stylings of an almost two year old.
Maybe a drink would be good now :)
Cheers!
Dave