The tennis courts are first come basis and you can check out equipment at the Community Hall for free.
The courts are very nice and well kept. I don't play but Dh does and he was very impressed with the courts.
They never appeared to be really busy, but over the Christmas break, I noticed increased use over previous visits.
The tennis courts are located in the Sports Court area and adjacent to the shuffleboard court and basketball courts (equip. also at CH for free) if those other activities interest you.
We really enjoy shuffleboard so we spent alot of time in that area.
I think the best part about owning
DVC is that we have time to "stop and play shuffleboard" and enjoy other leisure activities at the resorts that so many people just glance over.