Back Bouncing/Back Trolling for Springers Help

I was out at George Rogers for a few hours on Friday, trolling herring behind a flasher, without any luck.  However, I did see two fish landed by powerboaters, but they weren't trolling.  The appeared to be going up river and down river, with their rods in their hands, and constantly raising and lowering  their rods, which I assume is back bouncing?  I couldn't see their bait's as the only rig that came up had a springer on the other end.

So far, my efforts for springers has involved trolling herring behind a flasher.   However, I am very curious about what other methods such as back bouncing that may work?  Do you back bounce a plug cut herring, eggs, prawn spinner?  How do you do it in a kayak?

I haven't found much on the web outside of the definitions for back bouncing and back trolling.

Can anyone shed some light on this for a newbie?

Thanks.

Back trolling is usually done with eggs, shrimp, prawns or plugs.. slowly backing down the river.

If they were going both ways then they were prob. just keeping constant contact with the bottom trolling herring or prawns.  The rule I stick to is water under 25 feet I am constantly bouncing the bottom or close to it.  Water over 30feet I fish suspended with the rod in the holder.  Sometimes by bouncing the herring you can trigger a bite with the falling and speeding up of the herring.

I have fished the way of which you speak. 

The setup is probably mainline, to a 3way swivel (or slider above a standard inline swivel), then usually trolling a prawn with a spinner blade (or without) on about 36" leader, lead dropper about 18" of line coming off the swivel, no flasher.  You can also bait up a double hook herring rig.

The action that you're observing is the rod lifting the lead off the rocks and snags but keeping the prawn/bait close to the bottom.  I have observed the power boaters going both up current and down current, but it's the same rod lifting action keeping the lead on the bottom but lifting it so it doesn't get stuck.   

This fishing method ALONE is probably responsible for my purchase of a Hobie pedal kayak to keep my hands free from paddling and hold a rod instead to actively let out or reel up as the river bottom topography changes.  You could just set the depth and then paddle around, but you're not necessarily keeping close to the bottom (which is likely where the fish are).

Thank you both for the help. Makes sense to me now.