If you have a location in mind for your next session, the best thing to do is to let me know the reason you chose it. If you absolutely must have the waterfall in the background, sharing that information with me will allow me to suggest a different day or time for your session to take place. But if the most important thing to you is to have well-lit images of the ones you love, then of course the background is secondary and we can work according to wherever the best light is.
My rule of thumb is: If you pick the location, I pick the time. If you pick the time, I pick the location.
I try to be as flexible as possible, and I use every trick that I have at my disposal to get the shot even in difficult lighting situations, but I can't get great images from horrible light. That is the reason that for me, light trumps background every time.
Until next time,
Leah