I'm deep in the middle of a similar conundrum, but I think I left myself an out; my plants like to grow through my vertical trellis and then continue growing up and towards the light. Every day or so during stretch, I go in and pull them back through and lay them up against the trellis from the back side, where they start growing again. This has the effect of laying the plant out flat against the trellis screen and making it cover more surface area.
I'll let you know what happens when stretch stops and they start stacking, but I'm thinking it's going to be good...