Just "finished" this job, at least the hard part.
Let me tell you, for anyone looking to do this flush without a mess, look into this adapter, not sure what other vehicles it fits, but it fit mine perfectly.
Cooler Line Adapter
Couldn't figure out why they sent such big hose clamps with it...made me laugh.
I removed the transmission line from the transmission cooler (since it was easily accessible by taking the grill off and it is after the radiator, so this allowed for a flush of the cooler and the radiator portion as well).
I hooked up a clear tube to this adapter and plugged this right into the fitting of the trans cooler using the original clip to hold it in place.
That drain hose went into a clear 1 gallon bottle to capture the fluid in 3 quart increments. Fill pan, start car to flush, stop car, refill and repeat till it came out nice and red. No problems, no leaks, no mess, controlled and contained.
I think this adapter was the key to making this so clean and simple.
When I was done, remove the clip, unplug the fitting, replace the clip, plug in the return fitting, fill and done.
Piece of cake. Just need to top off and do a test run during daylight.
Thanks for all the tips.