Honestly by the time the party actually starts, most of the battle is already won or lost based on what you did the night before.
If I know we’re having 10 or 15 people over, I’ll check my numbers the evening before and make sure pH is in a good spot and my chlorine isn’t already drifting down. High bather load plus 95 degree sun is a recipe for cloudy water if you start on the edge. I also clean out the skimmer baskets and make sure my filter pressure is at its normal baseline. If I’m already 6 to 8 psi above clean pressure, I’ll rinse the cartridge so I’m not handicapping circulation during the party.
Day of, I just let the equipment do the work. I’ve got a Hayward Super Pump and I’ll run it continuous through the whole event, returns angled slightly up so I get that steady ripple across the surface. That keeps sunscreen slick from just sitting there and helps push leaves toward the skimmers instead of me chasing them with a net like a lifeguard on duty.
One thing that helped a ton was setting up a rinse station. Cheap garden sprayer by the gate and I ask people to quick rinse their feet and legs before jumping in. Cuts down on grass, mulch, and random gunk way more than you’d think. After that I dont touch a thing until the next morning. Quick vacuum, empty baskets, maybe a small adjustment if saturation index drifted overnight, and done. Anyone else notice the water actually looks better when you stop hovering over it?