Bought the Toyota mudflaps, despite guidance saying they wouldn't fit my 2024 LE (4WD). The rear went on fine, but the mini-mudflaps on the front interfered with installation. I ended up glomming the mini's on top of the Toyota mudflaps.
No drilling required on the rear. Two small holes into plastic on the front. Only used the fasteners provided.
I visit my kids in NC, where they habitually spray the roads with brine in the winter. There's a few beaches left here you can drive on, where even the dry sand is loaded with salt.