Attempting to grow hops any way but up is a full time job...I grow one (well it was one, it is now a mass of shoots every year) and have attempted to grow it along a fence, its growth rate is phenomenal and its lead shoots I call snakes, as they relentlessly try to go UP every day I bend them down and tie them in, it is a fight but they are progressing the way I want them to, if with a fight!
A flagpole would be useful...the hop fields of kent were all 20+ft poles and then wires and were picked by blokes on stilts...perseverance will get you there, it gets them where they want to go that is for sure!