We did this in May. Got the idea from this thread.
We were staying AKL DVC, so made our one night stay at AKL standard view, Platinum package. As Platinum package stay, you get use of the concierge service and lounge.
FIRST DAY, I went down early and "checked in" to our Platinum stay, got our KTTW cards. Went back up, got daughter and we went up to the lounge. She grabbed something quick, and I got a cappacino. Then to bus to Epcot for Around the World Tour. It is SO MUCH FUN. I highly recommend this! Then we grabbed a greek salad for her at Epcot, which she ate there, and headed to the entrance. The Sammy Duval shuts down between noon and 1pm, so we had a little lag time here so we took the monorail to Contemporary. We changed there, had brought our swimsuits, etc, in backpack with us all along. We had waterskiing lesson, then deluxe tandem parasailing. We were motion sick from the waterskiing, it did not go well at all. So we were just enduring the parasailing and waiting for it to end. (Don't worry, my daughter did this last year and loved it, and we will do it again when we are not already sick before we go.) Back on land, we went and threw up. Then we changed, and got a taxi back to AKL. Showered, got ready and started to feel better finally. Took a taxi to Grand Floridian. We had our photo shoot. Then we went to Victoria and Albert's for dinner. (You all know they give you a boxed rose and gift bag with date nut bread in it and your personalized menu when you leave, dont' you?) After that, we went back to the photo stand, picked our pictures and paid the extra $55 for the photo CD of all the pictures from the shoot. Then we walked down to the pier for our Fireworks cruise. There were others on our boat, and the "captain" seemed new to Disney and woefully uninformed. But it was pleasant and relaxing, just not what I had expected. We dropped the other group off at Wilderness Lodge, where they were staying, and he took us back to Grand Floridian. We got the monorail to Magic Kingdom, then walked down and took resort bus back to AKL. On the bus other people were carrying their rose boxes and talking with us, it was very nice. Back at the lodge, we stopped by our room just to see what it was like, and what they do for turndown service. There was a nice welcome gift, and chocolates on the pillow, but the room was not in a desirable location. But I did only pay for standard view, and we were staying in our DVC, just booked the room to get the package.
DAY TWO, we caught resort bus to Epcot for Backstage Magic Tour. Our tour guide was really not good at all, which greatly diminished the tour experience. I imagine it could be great with a good guide. It is a 7-8 hour tour, with lunch at Whispering Canyon Cafe, which was fun due to a great server. The tour takes you back to Epcot at the end. So after that, we took the monorail to Grand Floridian, had a snack of ice cream at Gasparillo Grill, then went for our massages. They were great. We each had really good massage. Enjoyed the steamroom, and then showered. We had brought a change of clothes with us, knowing the spa had all the facilites we need to get ready for a nice dinner. Strolled over to Narcooses for dinner. We went out onto the porch for the fireworks. You can see from inside, but people block the view. And the restaurant staff are used to everyone getting up and running out , and everything just waits until it is over. After dinner, we went back to our hotel, though I don't remember exactly how we got there, I don't think it was another taxi, but might have been. I used my last dining credit at Mara, getting a chef salad, and snack credit on Mickey Ice cream bar, before it closed. I know, a terrible waste of a dining credit, but we simply didn't have time to use it in our two busy, activity-packed days.

My daughter used her last one on room service, but we never ate the food before we left WDW, so wound up wasting it too. Too bad, I really hate to waste food, but we just aren't that big of eaters.

So, we packed quite a bit in our 2-day, one night Platinum Plan. As I said, we never stayed in the room, but did get our chocolates and welcome gift from it.

So, I read early on in this thread, someone asked if anyone ever did it.
Yes, we did, and it was great. I fully expect Disney will be changing things, so we may not be able to do it in the future without a minimum 3 night stay and 3 day tickets., etc. So I am really glad we jumped on it and went ahead and did it. We would likely do all these things through the course of 3-4 years, but certainly not in a two-day span. It was alot of fun, living it up like rich people for 2 days.

Remember to bring a jacket or shawl or something to Victoria and Albert's. You will get chilled in there. They even have shawls to loan you, it is so common.