I decided I better practice
I decided I better practice this at home before having to do out on the road. Definitely recommended for Silvio owners to practice this as it is so different usual DF rear wheel removal. After a couple of tries I decided the following was the best way for me:
1. First, shift to small-small, and remove the skewer. I remove the skewer completely and don't use the springs as they serve no function in the Silvio configuration (they do in a DF setup of course.)
2. Shift to small-small of course. Remove drive wheel, and the derailleur will likely pop out as well. Leave it out and arrange it as follows. The fact the derailleur comes out is not a bad thing to me, as Silvio can then stand on on her own on the ground. I found that arranging the derailleur as in the picture below helps me to reassemble the wheel.
3. Fit the wheel with cassette in the correct placement with respect to the chain, then position the derailleur in the approximately correct position as per the picture below. Don't worry about putting the wheel in the dropouts yet, and don't worry that the derailleur hanger is disconnected. In this manner you are dealing with only one step at a time.
4. Now slot the wheel into the dropouts. I find it much easier to slot into the vertical dropouts with the derailleur disconnected. I think this is because the direction of the slot with respect to the derailleur angle is different on Silvio than it is on a DF. With the derailleur disconnected, slotting the wheel into the dropout is no more difficult than on a DF. In the pic below the wheel is in the dropouts, but the derailleur is disconnected.
5. Now that the wheel is in, I can reach over the boom, hold the derailleur with one hand, the chainstay/fork with another, and slot the derailleur hanger in between the chainstay and fork. Ta da! At this point, the skewer goes back on.
PS. Sorry for the toes, but I was bending over the boom and taking pics with my phone while holding onto Silvio. This was a field practice after all so I couldn't use any other props to hold up the bike!