For What It's Worth - I'm also an active guy, including conducting orchestras, sitting and playing for long periods, etc. Haven't tried all that's out there but, what works for me is Depends plus a liner. With only Depends, I can last about 2-3 hours. With the added liner, it's up to 5-6 hours and sometimes, during the night, more. I'll add that, at night, I can feel the urge and make a quick trip to the john, holding you know what. Also, with the liner, I'm able to, sometimes, just change it, a lot easier than going through the whole take-off-the-pants routine. Been on several 6-7 hour flights doing this, and it works. Speaking of pants, I'm had to adjust my wardrobe to include pants that can be taken off over my shoes. Sometimes, restrooms aren't the cleanest, and the ability to keep ones shoes on is a huge plus, plus a time-saver.
Bo