Ideas needed for making an irrigation system that can be moved around

I have a small orchard that is on a slope from north west (high corner) to south east (low corner).  I have a well that I want to use a solar well pump to pump up hill maybe 4 feet at the highest point. I am thinking that I can bury a black flexible HDPE pipe and make connections for each row.  I will use low power irrigation valves to turn on each valve.  The standard 1/2 inch black HDPE pipe can be hung a few feet off the ground and  then put a 0-3 GPH Drip full pattern micro bubbler on each side of each tree. (https://www.amazon.com/Rain-Bird-MBH4PKS-Irrigation-Micro-Bubbler/dp/B00KXEOCY8?th=1)  
I like these bubblers since I can tune each one to the needs of the tree and they are easy to unclog.  Because of the slope I can drain each line for winter.
What I am looking for is a way to disconnect each valve and store inside over winter.  May even use the valves somewhere else if the trees no longer need irrigation.  I have very moist clay that tends to experience capillary rise so after the first couple of years I may only have to irrigate during long droughts.
Does anyone know of quick disconnect low pressure drip type irrigation fittings?

So I came up with an idea that uses a lot of PVC fittings but also lets me use my Rain Bird one inch valves.  Here is one where I had three valves that connect to black poly hose and it shows the old underground system that was left. I cut out the old system later.

SharkBite fittings are very pricey but they can be removed and reused, using their special tool.  I am not certain if they will accept black irrigation tubing but a 1/2" pipe is measured by the outside diameter, meaning the SharkBite connecters will accept copper, PVC and Pex  It may not connect to the black irrigation tubing but  if these will work for removing the valve for the winter you can get adaptors, especially in PVC, to connect to the irrigation tubing and still be able to remove the valves when needed.
For that matter you can get unions for the PVC pipe and unscrew them to remove the valves for the winter, then in the spring screw them back into place.