I am so sorry Joan,
You are discribing one of my nightmares.
Useless right hand...arghhhh! (Charlie Brown music Arghhhh!)
My only suggestion is to hook yourself up to a strait drain...put the tube in and tape it down then plug the end. That way you only have to aim and unplug...for the couple of days in/at the hospital and first couple post op at home I would keep it hooked up to the leg bag...then you just have to empty the bag out directly into the bowl.
Once you are on the move and feeling better you can plug-and-go.
Depending on how your skin is you might want to put down a sheet of coloidal bandage directly onto the skin with a key-hole cut out in the middle for the tube...then you tape the tube onto the colloidal sheet and not onto your skin...if this is going to last for over a week then it is a great way to protect your skin from damage...
Don't forget to wrap the base of the tube with a folded gauze sheet...to absorb the gunk!
Good luck
Sharon