Sure you’ll know or disagree with some of these, but since it’s not your first trip I’ll just try offering a few opinions:
Hopefully you have some dinner plans in order, don’t absolutely need to every night, but for some places you really want to eat at it doesn’t hurt.
If you need a ride break but still want to be active, check out scavenger hunts at the parks (MK and EP in specific) and at some of the resorts if u are staying on site
Don’t be afraid to leave for say, Universal or C World if you want something different
Take tons of pics! Sure you know this, and the photographers on site will probably go the extra mile getting you an extra pic/pose if they know it’s a special trip, speaking of:
Get and wear the “I’m celebrating” pins, you’ll get lots of congrats and maybe some free stuff!
Unlike lots on here, take everything in stride. I try to and then just come vent on here later, but in the moment, don’t let any real or perceived snub affect your mood significantly.
Don’t be afraid to leave the site- if you see a bar/restaurant/underground fight club you think you’d like to see, it’s not a huge ordeal to drive/Uber off site, and may still save you a little $$ when compared to WDW’s similar items. Also it will be Xmas time, and the Gaylord Palms just across the interstate has an impressive “ICE” display of pretty cool looking (and temperature) ice sculptures, slides, etc. just wear colder weather gear and they’ll give out large parkas. Stick around and spend a couple hours there and get lunch even, it’s a pretty place during the season.
But don’t get on International Drive for longer than one city block, or you will just have to go directly to the airport for your return flight, since you’ll have been sitting on I-drive the remainder of the trip.
Have fun!