I'm in the planning stages of a large project for Flipside, the Texas burn,

I’m in the planning stages of a large project for Flipside, the Texas burn, next May. One of the elements is a labyrinth that I’m going to make out of 6 to 12 inch high stakes strung with LED pixels of some sort. I’ve used P9813 the most, but I’ve never done a string this long before. Any recs on what LED type I should use? I’m thinking the square base pixels and assume 12v will make it easier. The ballpark length is 64 meters. Assuming 100mm between pixels and 12mm pixels, It would be 6 of the 100 pixel strands.

The center ring is going to have a light up backdrop with a friend playing an electric violin covered in sound reactive LEDs.

It looks like I can’t easily find P9813 pixels anymore, so I guess the only option will be WS201X.