If we have 3 adults going to Florida would only 2 be able to go inside the parks and the other one stay in the room Does that go for the other resorts too I am new to this we usely stay at comfort inn main gate

if you want to play fair then let them know the adult is staying. keep in mind if you do, they charge accordingly

The more the merrier ! Enjoy your time at Disney !

Yes, unless the third adult has a park pass. If you buy a package, you typically must add each person in the room to the package.

I don't think anyone cares if someone doesn't go to the park. Its America do whatever you want.