I've decided to run a bento on the TT bike given all these longer rides. That way can store junk that would go in a jersey and can instead wear my old skinsuit.......hello kom tries!
I can also try to leave the bento on there for TT's. It's more aero smoothing the air from the stem, and easily removed if anyone has a problem with it.
Tomorrow is long ride weeknight. I think I'll structure it around 3x12's at 100%. Segment is about 4.4mi each way with some elevation, but I average over 20mph on it. So, outbound, rest in neighborhood, inbound, rest in that neighbood, outbound, easy spin back. Workout itself probably an hour and change, then just cruise Z2 feeling fast and slick after that.