lol no, Ricean vampires don’t actually need to sleep in coffins.

[Lestat’s about to read Louis the bedtime story “Go the F*ck to Sleep”]
They do sleep in coffins in IWTV, tho, bc what they do need is complete protection from sunlight, and from anyone who might disturb them during the day. NOLA had those huge French windows everywhere, lots of sunshine in every room 😉
The deathsleep takes them and they’re powerless against it; when the sun is up, the vampires are down.