For those who don't want to go down the Tena Pants (mens) route.
SWMBO (for a small fee) will simply install a catheter.
Run the tube down your leg and down the outside of your boot.
May want to flash the haszards to warn those following you.
You could use the same option to run the tube out the side of the tent to avoid the midnight walk to the toilets.
One mate bought and fitted "The Urinator" to his dry suit.
Basically a tap attached on the outside of the suit with a pipe long enough to get to the nether region attached to a catheter condom.
He tried to demonstrate the how it worked while on the boat.
We looked at the tap expecting a golden stream over going over the side.
Nothing.
Looked at his face and saw the look of surprises then shame.
He then said...
"The condom has come off"
Should have bought a smaller size...
He blamed the water temperature, it was August.