Last year we planted 130 blood beeches, "bare-root plants". The planting distance is about 33 cm and I used a "drip hose" from Gardena. To be exact, I had to use 2 pieces because they are only sold in 25 or 30 m lengths. That basically works quite well. I believe it is rather beneficial if the space between the plants is also watered. According to the nursery, this stimulates root growth.
However, in the first summer, either I did not have to water at all because it rained, or it was so hot and windy here that the new lawn had to be watered 1-2 times a day. In that case, I simply took the garden hose and did everything with it.