If they are anything like mine the will propagate on their own if given room. Move the bushes you have to your desired location and keep the weeds and brush cleared back from them and they should eventually start putting up shoots.I think typically they will only fruit on one year old cane..... cane grows first year, fruits the second and then is dead or atleast that seems to be the way mine work.

Thanks for the information, afss.

I'll give it a shot moving them and hope they survive.

Blackberries also tip root. If you can check on them frequently, watch for when the tips of the canes reach the ground. Shortly thereafter the tips will start to form roots. Before the roots get too long, lift the tips up, bury a pot there (filled with soil or potting mix) and put the tip in the pot. Even if the roots get solidly anchored into the ground, dig up a small root ball and put it in the pot in the ground. In the spring, you can sever the mother cane and lift the pot out of the ground. You will have a young plant with a lot of roots all in the pot!

Alex