I’ve been using a watering system for 9-10 years with some success…and a couple failures.
I’m using a Galcon Bluetooth Flip Open LCD Timer with both sprayers and ‘drip’ emitters for a few months now with good results. Quick to program and intuitive. I used another battery timer (Orbit from Lowes) for the past 9 years but they became very undependable. I travel a lot so I always have someone feed the cat twice each day and check on my trees. When a system fails-and it will-have a back up plan. Make sure your ‘person’ is dependable. Losing 65 trees due to an undependable person will hurt for years!
As Frank mentioned, create separate zones for different pant needs; bald cypress, several water events per day in one area or bench Vs juniper-not so much. I use at least two emitters for each tree so if one type does not work, gets clogged or a cat knocks it over, your tree is safely watered by the second emitter. I like both the 360° sprayers and the drippers as each has a place in the system. Change the battery at least every six months, not every year as instructions states. Better safe than sorry.
After setting up the system, watch each tree during the watering event to make sure it is completely watered and the system works as planned. There are always issues that pop up!
Do not change the system time cycle before a trip unless you can physically watch the watering cycle a few days before leaving the system to the programmed timer.