It's not a "high pressure" line..... they wanna sell you stuff you don't need.
You're on the right track with the hose clamps..... I would use double clamps just for peace of mind.
Pwr Strng return hose is what you want.... supposedly (myth?) the tranny fluid, over time, will degrade the rubber in fuel line hose.....
If you wanna stay "stock", check out a local salvage yard for a new line.
mike