alright - I know you have legs covered and abs...there ARE some upper body exercises you can do:
Shrugs on a calf raise machine - get in and simply shrug the weight up
laterals with a cable and a single handle (stirrup) handle....if you can, slip hand thru and simply let the cuff rest abour the wrist on the forearm...same with forn and rears
Chest - find a pec dec that allows you to rest the entire forearm on the pads...you xab angle elbows and get a good range of motion
...bis and tris - not much you can do.
Weight......I would use this time to cut as much as possible...if you pile on the weight now it might not be pretty, although if you keep the intensity on the legs high you might be ok