The shower was no problem for me, although I did get a shower stool just in case (did not need it). I got a big suction hook (wal mart variety) and put it on the shower wall to hang the bag on. That way the bag remains upright, and you can close the shower curtain/door. Have an extra towel or three or four around just is case.
By the way, my surgeon said NO BATHS until the cath was out - too much opportunity for infection. Also, he wanted no baths until the sutures were healed, again because of potential infection.
I slept in the bed (don't own a recliner, no space for it). I got a couple of cheap fiberfill pillows to use as blocks so that I would not roll over on the tube, and could throw them away if there was a major leak.
Get or use a stubby bucket (short/squat, won't tip over easily) for the night bag. It gives a way to carry the bag, keep it upright, and avoid the almost guaranteed "did not close the drain completely" flood on the floor.
We have a list of useful "stuff" - give it a quick review -
Prostate Cancer: The Really Useful List made by HW people for HW people.
https://www.healingwell.com/community/default.aspx?f=35&m=1717641