I would bury pipe and keep emitters near the tree, anything above
ground is a target for squirrels, rats, mice or any other varmits,
farm equipment and stupid employees.
Most of the initial cost of this type of irrigation are labor and
markup. It is very labor intensive to install, BUT after the install
it is the least labor intensive. You can water the whole orchard at
one time instead of waiting for the reel gun to get there. Or zone it
depending on how much water you want to lay down at a time.
Just a suggestion from a Water Well Man.

I tried drip for ten years. It was HORRIBLE. I have a very high iron
content. There's an iron bacteria that forms a soft flake that plugs
emitters. There was a bit over ten miles of pipe and 10,000 emitters.
Something was always broke/plugged.Went through all kinds of emitters,
filters, acid injectors, pipe styles. I was losing a lot of yeild potential
to these problems. I gave up and put in a large well and traveling gun. On
the whole, a much better way to go for my situation. It does suck in a year
where water is needed all summer. This is the second time, the last was
1988. I had drip then - it sucked more than this.

Karl