Fishing waters close to your home, or hometown.
The word backyard itself is used as an adjunctive noun (not an adjective) when paired with another noun, e.g. backyard barbecue, backyard mechanic. The word backyard is not an attribute in either case.
in your backyard
My backyard My backyard
Depends what backyard.
Probably in the ad director's backyard in California somewhere. That actor's "fishing pole" is actually a fly rod, and in the last scene, you can see that he has no idea how to use it.
No, backyard isn't an adverb. It is a noun, and may be an adjunct in terms like backyard barbecue.
a barbecue that goes in your backyard
it depends in what type of backyard you have.
backyard fish culture
Our Backyard was created in 1984.
No, it is a noun. But it can be used as a noun adjunct with nouns as in "backyard barbecue" and "backyard mechanic."
in his backyard he built a small garden