THANK YOU!
Yes - they are on the same MDE.
I think the easiset thing, then, is to NOT use my daughters MB on the first day, when she is not there, (because I'm paranoid I'll accidentally mess it up)
and instead create 4 phantom IDs, one in the CL room, 3 in the standard room (all for younger kids, as you suggest) and use these bands to get our SDFP. (I want 4, because althought there are only 3 people on this trip, we have 5 in our family, and I want to get phantom bands for as many family members as possible - to use when we all go togther next time)
It doesn't even matter that the standard room doesn't start until day 2, right? (And, yes, I did read the OP, just want to make sure I really, truly understand because I had never heard of this marvel until yesterday.)
I'm planning on making the phantom names in our reservation first name = middle name preceeded by a Z, and last name = last name preceeded by a Z - again, so I don't accidentally get them mixed up, and to get the phantom bands in the color gray (none of our real bands are gray).
Then, I can use these phantom names, and phantom bands forever, right? (Or until the rules change....)
Does this sound like a good plan?