If you have time to scout and pattern the deer pre rut is where it is at IMO. The deer are more predictable durring this time. But from what you said you won't have time to scout so the rut is your best bet.

As for decoys, I may get shunned for saying this but I don't like them. They do work as others can attest but I think they do more harm then good. Scents, calling and ratteling may definately be to your benefit.