Hi,
Is Wyndham Orlando Resort the Wyndham at Downtown Disney? If so definately stay there as it is very convenient to DTD and the Disney Parks. Very nice area and very nice rooms. There is a sort of play island with pools, playground and tennis courts. If this is the same Wyndham, don't hesitate to stay there.
Renaissance Worldgate is an okay resort. I have stayed here in the past when the resort was a bit nicer but it is still a nice place to stay. It is about a mile outside of Animal Kingdom. I last stayed there in Dec. 2002. Rooms were clean had a nice size refrigerator, coffee maker, iron/ironing bd, hair dryer and safe. You can see several fireworks going off at Disney from this hotel either in your room or from the parking lot. There is a back access road from this resort which leads you directly to AK and is very convenient to use.
Definately check on the Wyndham first. If it isn't the one in the DTD area, then I can't comment on that one. Have a great stay.