Dave--
Since the weather is getting so nice again with autumn finally upon us, i thought perhaps you may be interested in doing more outdoor movies. This led me to the idea of having one, or more, models doing a scavenger hunt video! I seem to remember doing something similar with Jayne quite some time ago, though it may have been chores she had to complete before going rather than things to find. But my idea is simply this:
Get one of our lovely ladies good and desperate to go as typical B2B protocol. Hand her a list that you have previously created of riddles or descriptions of objects, or locations (on your property of course) that she must find while coping with her bladder. If she reaches the end and gathers all of the things while staying dry, then she gets to relieve herself in the toilet. If not, then obviously she gets to model her wet clothes for us.
If you want to make things a little more interesting and/or challenging for the ladies, perhaps set it up so that they must drink 8 ounces of liquid or torture their bladder muscles with one of your small cups for them to fill, and not a drop more!
I know its a little more elaborate than some of your videos and does take some planning, but its something a little different than a standard time to go or holding contest that i think could be rather fun to see.