Yes of cause you can trot with it I have. It's a bit heavier than some bolo's but it's desighned for large fish so should cope with barbel OK.
If you do want to try shortening the rod when playing a fish do it with the fish running using the drag on your reel: this is so you maintain a tight line and don't allow any slack and loose fish.
I use mine mainly at a local water with some large roach but it has a good head of carp. I can fish fine enough pole rigs for the roach and because I still have a running line still stand a good chance of landing the carp: had them to 20lb +.
Another plus is you can let carp run so they are played well away from the swim, there's less chance of wrecking it and keeping the roach going.