The loop you speak of for the sickbirds is going down this Saturday. Not that I'm doing it... I'm not sick enough. Last week Forrest did some serious deforresting on USB. Rumor has it that there are 4 takers thus far for the sickbird.
Note that on the USB to Eldo we did of S Boulder, all of the rapids were good to go (well, except maybe Gash, LZ, and the lead in to RIMBY, and Harmon was pretty juicy). You definitely cannot portage the Gross dam without Denver Water busting you, so plan on running a shuttle from the USB takeout to the LSB put-in.