Tips on straightening coiled HDPE 11

It is in a coil, 100 feet, roughly 6 foot across. When it stops raining I'm going let it uncoil and drill a hole in one end to secure it to a tree.

Do the same to the other end and attach it to my truck and slowly straighten it out in the sun .

I'm sure there will still be some bend to it. I'm thinking I can take the 1 foot sections and immerse them in a lobster pot of boiling water and then run a straight Dowel through it before it cools.

Has anyone tried anything similar ? Would appreciate any information