Side yard walkway to back patio
We are putting an addition onto our house in the very back, which includes a covered patio and uncovered which will stretch out into the view below. The photos show the sideyard that will lead to those areas. The GC first wanted to do a concrete sidewalk, but I am thinking a flagstone walkway with a concave curve would be prettier. I live in zone 6 Tennessee. I am wondering if I have enough room to put 3 paperbark maples around the walkway. I would like a riverbirch near the driveway, but I am afraid it will be too crowded. I have 2 very small full moon maples in pots that I will be using too. There is a yellow lilac I bought several years ago and placed way in the back, but it's not done much. I think I will move it forward somewhere too. Are there other things I should consider?
Our property line runs just past the pines on the right.