mike27oct, thank you... that is in fact my current plan of action, but was hoping there was a way to incorporate all my smart plug devices into one Scene, but I suppose that's not possible.
It seems that "Scenes" are specific to the device manufacturer, as opposed to just the Echo... as i thought they were. Oddly, it doesn't even appear the Wemo devices even have the capability of using Scenes, while they have "rules", they don't seem to work the same way.
But for now, as you've suggested, I've moved the two TP-Link devices to the bedroom (Light and fan), while using the Wemo device in another part of the house not affiliated with my "Bedroom Scene".
Thanks all,
Dave