Depending on where you live, spring weather should have returned, so it will be relatively easy and a great experience to get outside and moving as soon as possible. That may start with just an easy stroll to the corner and back, but walking is great exercise for recovery....just don't overdo it. Since it was summer when I had my surgery, I wore a pair of those long, long basketball shorts that are being worn these days. They covered the hip bag for the catheter and I didn't have to lug around the large bag.
I think someone has already mentioned putting a waterproof pad on his side of the bed in the appropriate area. It likely will never be needed, but prevention is better than having to clean up a wet bed. I wore briefs and a male Guard pad to bed, with the catheter bag next to the bed. Be sure to always keep the bag lower than where it exits the body. It's not a pleasant feeling, nor is it a good thing, if it drains backward.
Fortunately, my wife, being a nurse, knew how to take care of the catheter bag and tubing. I was completely ignorant for the first day or two, but took care of myself after that. Learn how the clip works that controls the drain at the bottom of the bag so you can start and stop the flow without spillage.
You can't anticipate everything, but you are definitely doing the right thing by planning ahead. It's not that bad, but it does require some adjustments for a while.