I am sorry to hear about Uncle M. I hope it isn't awkward with the exW, but I bet it won't be. it's usually only as awkward as you make it.
As far as WildGirl. I believe she is doing the "slow fade". She's hoping eventually it will just die so she doesn't have to do any dirty work. I wouldn't even send the random texts and just stop communication. See what happens. I am glad you can recognize the fun in it while it was happening. I don't think she is the one for you, and she doesn't sound much like fun anymore. If it wasn't for the cruise, would you just end it?