I’d say Tuesday or Wednesday, before the Labor Day crowds start. And the only 2 rides that don’t take express are in IOA. I’d get them there before park open, and tell them to do Hagrid’s first. That’s the one ride not taking express, then the new Dino coaster, as that line moves faster. That is the other ride with no express. Then they can do single rider if line looks too long for any of the other rides there. Express would make the day go much faster, though.