Don't sweat the shower stuf -- It's a habit, not a real need, to shower daily -- The nurses in hospital don't push it, so why should you? A daily damp towel bath will more than suffice until the stairs can be conquered.
Personally, I did my best to avoid a rehab or skilled nursing facility (aka SNF, known to the med profession as a "sniff")because I KNOW from previous experience that I heal much better at home than anywhere else.
If you still have the trach when you are discharged, you will most likely need a suction machine.
BTW, here's a blow-by-blow of my own free-flap surgery, but I didn't have any bone work done:
http://oralcancersupport.org/forums/ubbthreads.php?ubb=showflat&Number=75331&page=all