How great that they are so vigorous. As a thought for next year, build a simple, fold-down trellis for them. There is one at the OSU Lane Extension office AG garden right on 10th by the ramp as a model. As to the current problem, it is pretty hard to untangle and bring down the vine, but you could try that. Alternately, use a stool if possible and prune them back to an accessible height. They should go ahead and bear a good crop for you. Any new growth can then also be trained sideways. Be careful if using a step obviously.