I'd prefer to set my bar rig like Rod does in his instructional video. That is, 3 way swivel, 3 ft leader w/lighter lb test to weight (longer leader increases risk of snagging, lighter leader so it breaks off), a "single" 1-1.5 ft leader/bait loop.
I found those bar rigs or wire extensions or whatever tangle etc, and 2 hooks (though allowed) just use more roe, take longer to re-roe (especially when the bullheads are around), increased chance of catching on rocks, snagging on nets and just plain suck. YMMV. The bite usually doesn't last long and when/if it comes, is fast and furious so you don't want to be screwing around untangling stuff.
I like the diamond weights, 2.5 - 4 oz .. or however heavy you're comfortable with. Your line drifting into others is really annoying.
I don't catch any less fish with the single hook set-up... except the old Filipino guys, they outfish me every time (I watch where they're casting).
But above all else, start fishing now and getting your hands on some roe and learning how to cure it. No matter how it looks, the stuff they sell YOU at the tackle store doesn't catch anything (for me anyway). Fresh, killer roe is like gold..do not lend it, share it or sell it
...otherwise enjoy your day sitting in the rain watching the old Filipino guys hooking up left right and center.
Casting and retrieving spoons and spinners also works. The hookups are way more fun.