here's my thinking:
in regards to whether or not the landowner's permission rule exists, i would assume that it's trespassing to land on one's property without permission, just like driving down a private road would be.
but, since a rentee/leasee can invite you into the house (give you permission to be on the property), they can give you permission to land on the property that they are renting, as long as their contract with the owner does not prohibit that.