Hi and a GREAT BIG THANK YOU to everyone who answered my post. I really appreciate all your advice and words of wisdom, as I've never seen either resort for myself.
When several of you warned against the trouble of a split stay (repacking and unpacking, 2nd check in, etc.) I realized that the many hours this would take, esp. with the young children, was not conducive to a relaxing vacation. Plus, we would be paying a whole lot more.
After a lot of thought (and flip flopping, LOL) I decided to switch to CBR, mainly due to a slightly larger room (we'll need to fit a portacrib, too), more actual bus stops, and the tropical theme. I am totally aware that it will not really be the same theming as the Poly, but it seems like it may just be close enough. It does seem relaxing! My favorite vacations pre-Disney were in the Caribbean, so this seems like the best of both worlds. It's a bit more than the Pop, but we are saving almost half of what we would have paid at the Poly. I think we will definitely try the Pop at some point, esp. with all your positive reviews on this thread and hope to get back the Poly someday, too.
As for the actual switch today, it was a little tough. Yesterday the CM had said he didn't expect values and mods to sell out for weeks, so I figured I had a little time-maybe a few days. When I called today to make my actual switch, the CM said there was no availability, at all, in any category at CBR!

He just kept telling me to check back in a few days and that this was the most popular promotion, etc. Then I asked if there was a different "pool" of rooms for the bounceback
free dining, and he said he'd have to transfer me to that dept. to check on that set of rooms. After 25 minutes on hold, the next CM in the Bounceback dept. checked that pool of rooms and said that not only was there no availability at CBR, but there wasn't a single room at any resort available!


So, then I ask her if she has the ability to check the General Public free dining to find me ANYTHING, ANYWHERE that's cheaper than the Poly. She tells me that CBR is available and would I like to switch to that?!!!!!!! HUH? I was excited, but so stunned that the other CM told me the general public free dining had no avail. there. I don't know if it was really sold out already and something just happened to open up at the moment or what. Who know's what happened, but we're now switched.
Again, thanks for all your input!