I Push jigs & only use one jig per line, and even when I'm flipping double jig rigs Livescope fishing I'm not really expecting doubles ... I just do it so I can distinguish my jigs from other things in the water.
If you're using C/C rigs .... why not wrap the rigs around a pool noodle and have a swivel or clip on the tag end of your main line ?? Then you can rig up while on the water, then un-rig before you trailer the boat ... and break down the rods for transport and only have the swivel or clip to deal with.
With double hook rigs, of any kind, you're going to have a hard time keeping them from tangling while running any distance on the water. Other than rod transports or rocket launcher holders being installed on your boat ... the best you can do is buy a bunch of those "lure wraps/covers" and wrap every hook/jig each time you run to a new spot.
I have a hard enough time keeping 4 rods with one jig on each rod from tangling ... let alone having 8 rods with two on each.