Originally Posted by
Bezalel
Why don't you get an in-line cable separator?
Won't help. The RD will still be attached to the bike by the Chainstay/RD loop.
However depending on the type of chainstay fitting, the OP might be able to Dremel a slot so the cable can be slipped out sideways once it's slackened. Then the RD and the cable can be packed in a small sack and tied to the frame someplace.
If the OP can't slot the chainstay fitting, or doesn't want to, he might find a clamp-on chainstay stop, and slot that.