Most use discrete packaging. However, I never have anything sent to my grow space. Not seeds and not supplies. If you have a third party address that you can use then by all means use it. If it is not addressed to the owner then they have plausible deniability. And even if it is a second residence that is registered in your name, they will find nothing at that address anyway. You would have time to make needed adjustments before they are able to follow the trail further down the line.