That height, and the concrete is a luxury compared to most crawls!! Will it be an encapsulated/conditioned crawl? Didn't see vents so I assume so.
The one at my old house was 2', not well sealed, and had plastic on the floor. Vented to the outside and we have humid air 9 months out of the year. Real nasty place.
The encapsulated/conditioned crawl on our new house is 7' high on one corner, enough to have a regular entry door, and there's a 12x12' slab in that corner where we have the well tank, water heater, water softener, and bleach injection system. I also have some shelves down there to hold crap. Then from that corner it gradually tapers to about 2' in the opposite corner. Even with the sloping grade, I store all sorts of crap down there -- it's like a warehouse for me.