I doubt the landlord is trying to screw you in any way. Most likely he wan’t to do the walk-through before you start moving thus not making you stress anymore about it. Regardless of what happens, the landlord only has right to charge you for “Normal Wear and Tear.”

To ensure the most refund, you should fully cooperate with your landlord. Ask him specific questions about what he would like you to do in order to ensure a full refund. He is probably coming early in order to give you a chance to correct items that you would otherwise be charged for.