One thing you can do with no harm to the crown would be to locate the end of one of the rhizomes that's now creeping away from your crown and, with a shovel, lift the soil underneath. Don't worry about snapping off some of the shoots, there are more to take their place. Try to loosen the soil back toward the crown and just snip the rhizome off as close to the crown as possible. Don't worry about harming the crown. I excavated a 6 or 7 year old crown that I wanted to get rid of last spring and wanted to make sure it didn't grow once it was dug up. I remember kicking it out of the way of the mower for about 2 months and when I looked close at it, there were a bunch of little sprouts coming up. From what I've seen, a plant that's been in the ground for 3 years can be completely dug up, trimmed back and replanted with no real loss of harvest. Sure the longer it's been in the ground - the more vines you can string up but how many is too many. I ran about 4 vines up each of 5 poles from one crown and ended up with about 8 lbs of dried hops one year. The problem is that once the crown gets too old, it ends up looking like a 'chia hop' and is very hard to maintain. Keep trying different things with them - that's the only way you're gonna learn. Have fun.