Upload & Sell: Off
Talk really loudl -- I SAID, TALK REALLY LOUDLY WHEN INTERACTING WITH THEM, TO BE SURE THEY CAN HEAR YOU. AND BE SURE YOU HAVE AN EXTRA CANE OR WALKER HANDY IN YOUR EMERGENCY KIT.
More mature clients may be less energetic or effusive, but may also be more patient. They may have a better idea what they want, and it may involve less frenetic exertion on your part, but they may also be more willing to allow you to direct them where doing so is appropriate and consistent with their goals.
One prediction I'm reasonably confident making: they'll be less concerned (and impressed) with gimmicks like backlit-kissing-in-the-rain shots, and more impressed with a calm and confident ability to document and produce classic-value images. You'll be rewarded for investigating and capturing relationships as well as individual personalities.
I suspect you will really enjoy this wedding.