Store the seed at 40F for at least 4 weeks then lightly cover the seed. soil temp 55-60F & takes 30-60 days to germinate

I would plant them indoors, in a seed flat or pot, so that the soil can be kept constantly moist. Takes about 2 months for fresh seed to germinate, probably a little longer for stored seed. No cold stratification is required. Later, after the temperatures warm up, you can move them outdoors to a full shade location. If the seed haven't germinated at that time, cover the flat or pot with glass or thick clear plastic, to prevent wildlife damage. Leave them in the starting mix for about a year before transplanting. VA Bluebells require shade and constantly moist soil during their active growth and blooming period. Once the blooms fade and seed mature, the plant will go dormant and moisture is less demanding then. They will form long, thick, shallow, horizontal rhizomes as they mature. I am about 100 mi. south of their southernmost natural range and they are difficult to grow here, because of the summer heat and high soil temperature. About 3-4 years is about as long as they will survive, before disappearing. :

I would say no more than 2-3 inches, possibly one inch.

Don't know about buying dry root Virginia bluebells, but the ones here (planted in spring) are long-term survivors in a sunny mixed perennial bed. As mad_gallica said, they are spring ephemerals and bloom here in May when the sun is not so high in the sky. Our summers can be quite hot and humid, but the Virginia bluebells are gone by then. I presume that they don't even need the protection from the summer sun which other spring blooming (non-ephemeral) perennials, like primulas, get underneath the taller sun-loving perennials of summer. May 25, last year.