We stayed at the Poly in July 2020, did a split stay between Riviera and Wilderness Lodge in December 2020 (warm weather), and did a split stay between Kidani and Grand Floridian during spring break this March. Used the pool at each resort and didn't have any issue with the pool being crowded or ever being closed. No one monitoring entrance or exit (although I know BC always monitors at Stormalong Bay) and it was a completely free situation in terms of usage, like it was pre-Covid.