Looking to plant 100 saplings this fall, they are 1-3ft tall. Should I space them out (20') right away or plant them closer together and plan on thinning/transplanting some later? I'd hate to have to move them again in 10 years but feel I can keep a better eye on them/water/protect from wildlife if I keep them close together for now. I was thinking maybe 7' spacing and then thin/transplant as they grow?