Just got back from staying in a 5 bedroom yesterday. Disney is quite easy to get to using I - 4 . Exit 58 (Champion's Gate) is just a minute away. World Drive exit for Disney is Exit 62. It would be about 10 min to get on Disney property, DHS would be about 10 and the other parks a little more.
Reunion is huge. We were in the Patriot's Landing section about 2 minutes from the waterpark. It is very nice but you need your car to get from one area to another. The waterpark is great for kids. I didn't go to any of the other pools but friends that were there said the 7 Eagles pool was good also.
There's a new Publix almost across from the Reunion entrance and Papa Johns pizza, Chinese take out, a CVS pharmacy and quite a few other stores open or on the way to being open.
You can also access 192 using Old Lake Wilson Rd. It would take about 7 minutes.