El,
Yes two of us already have PH (left over non expiring tix), the other two will most likely be upgrading their day pass, we had a one day ticket as part of our pkg. Only way to get discount code for room. I now will have two one day tickets, but I can always use them in the future to upgrade.
We arrive in the evening on the 9th, hopefully we will have the energy to go to DTD the first night, we love the boat ride from the resort. Saturday and Sunday we will go to MGM because of Super Soap, not for me lol, but Dsil is huge soap fan. With our PH I hope to also go to another park each of those days, but not sure which parks. Monday we will go to MVMCP

only, I have found in the past that we can get into the park as early as 4pm, and so if we stay till 12am we will have
a full 8 hours. We have been known to do this in the past. With all adults this is easier to do. We relax in the morning at our resort, then PS at Kona for 2pm lunch, relax at Poly prior to going to party. That is the plan so far. Tues will most likely be Epcot, and I can't leave WDW with a last park day visit at MK. I could go to MK everyday

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I think your plans look good, the only suggestion is to try AK instead of 2 half days at Epcot. With the ages of your dd the Lion King show, Nemo (will be new for me) and Safari are really great attractions. It is not just another zoo. AK is really fun, and pretty. The disney theming is excellent at this park. Everest is one of my favorite rides, but with dd, who would probably not ride, it may eat up too much time. Unless you decide to split up to be able to ride.
I know this is your first trip since the 70's, how exciting. I would love to help you with any other questions you may have. I took my kids many times when they were young. Most of my recent trips have been with adults/teens. Everyone is free to do what they want, so we have really been able to experience many things. I average a trip about every 9 months or so, and would like to go more often but vacation hours and desire to travel to other destinations prohibit more frequent trips.
I think that having your Mom along will help with touring, make sure you take the time to relax during each day. POFQ is a really nice resort. Your dd will love the pool and slide. Take an upgrade to a waterview room if offered, the river is very pretty. Avoid bldg 7 near the parking lot, this is where the buses line up in the am. We like bldg 5 and 4 the best, close to food court.
I can let your know as we get closer if when we can try to meet at MVMCP, let me know if you have plans to meet anyone else. I haven't looked at the schedule for the party yet, so it may be easier to pick a time around a show or parade. You can PM me if your would like, otherwise feel free to post on your thread.
Judy