All the suggestions made here are great. One thing I would add - a washable sheet protector (it’s about 3’X3’ and completely washable). You can get it at CVS or any major pharmacy.
After graduating from diapers and then to pads, after a few months I was completely continent and happy….and then it happened - the out of nowhere wake up at 2 in the morning soaking wet in urine scene. I wanted to scream.
Had to wake up my wife, strip the bed, throw out the $400 Tempurpedic mattress topper, etc. Thank God we had a waterproof mattress cover or else the $5K latex mattress would have been pitched too! It was a real emotional setback for me.
I got the protector pad the next day and it has since saved my butt a few more times. I finally figured out that if I ate a very gassy meal - beans usually (which I love) my sphincters must get confused and allow the floodgates to open, letting out both gas - and urine. And I did my Kegels religiously!
Sorry, lots of TMI on this site but that’s what we’re here for.
Anyway, just my 2 cents since I sleep completely unafraid now even though it hardly ever happens. Best to you!