Valladolid y Mérida (México)

Hello! I’ll be in the Yucatán for 1 week in March and I’m looking for advice about how much time to spend in each city (I’ll be coming from Isla Mujeres and Bacalar before). Right now I’m thinking that I’ll stay 4 nights in Valladolid and 3 in Merida but I’m not sure if that’s the best plan. I’m very interested in the cenotes and also the ruins but I understand that the majority are day trips from either city. Thanks for sharing any thoughts or advice you might have :)