That's a nice looking garden space. Mine is way less refined... but it grew really good for the first year. It only gets better from here.
I think I'm going to do a few more things in grow bags next year... I had pretty good luck with them. I want to try a couple with potatoes. I will say they require a little more water then growing right in the ground.
I'm making good use of a section of the yard that rarely gets used for anything because the lower section stays wet and it's on a slope. It will level out the ground, and the standing water just below the surface should wick into the garden bed and help keep things watered. At least it sounds good in theory.
I'm also hoping it will help the neighbors on the other side of the fence some. Their yard is wet all the time. Some of it is self inflicted since they had a pool put in right across where the water would run and our hill is littered with natural springs all over the place. There is at least three on my property. Two of which are under the house and one along the back fence. When I put in the section with the fire pit, there was a couple times it rained while I was doing it. The water coming into the back trench looked like someone turned on a hose, there was so much water flowing.
The section of the wall foundation I just finished completely filled with water after the last rain we had and there was a thin, even layer of water in the trench when I dug it. I used it as a level to keep the the depth on track as I dug it. In any case, I'm hoping to slow the flow to help the neighbors out as well as helping to keep the garden watered. Hopefully, it will be a win - win for both of us.
The other reason I'm putting so much time and money in this is because I only want to do this once. Both sheds and the fire ring area were done the same way and are holding up well. The one shed was done 10 years ago and has not moved as far as I can tell, The other shed about 5 or 6 years.