Smoker area

I live out in the county on about acre and half next to a major highway. Would like to set up my smokers outside and provide seome privacy. Currently have a rock wall that spans my property thats about 4.5 feet tall. Maybe would like to build off that with more rocks if I can find some that match or privacy fence. Would like it to also be a solid wind brake. Any ideas?

Some day would like to build something over the top of it for cover, any ideas also?

This is the wall, I have a shed on the wall but don't want it to.cloee to that.

Wall is very close to the house. It's a short walk so it would be ideal since I don't want it close to the house. House is a split level wood siding house. Not enough overhang on the side of the house to cover in bad weather.

Here are some photos