What to expect
Burial finds mean more when you can understand the objects together. That is the reason to allow time here. Tumbas Reales focuses on the discovery of the Lord of Sipán; Huaca Rajada–Sipán, where the tomb was found, is another destination. Use the full museum name when arranging transport.
How it fits into a journey
Combine it with time in Lambayeque. Put Túcume on a separate day if you prefer looking without rushing; one outing need not cover every archaeological stop.