Tom,
I tend to have a cross-lock snap at the end of my dropper line. That snap allows me to change weights easily based on depth and speed. During a typical day of 3-waying with cranks in the winter, I may end up fishing 3-4 different weights, ranging from 1.5 oz up to 4 oz. The clips make it easy to change weights without having to retie.
If I’m concerned about lines getting tangled when running from spot to spot, I just take the weight off and close the snap (important). That little length of dropper line tends to be pretty well behaved and not get all wrapped up with the other rods.