I inherited my summer fruiting canes when we bought next door' garden, they were very old then and barely fruiting, but a good chop back and some TLC and they are soldiering on - no idea of course of their variety.
The rest of my garden is riddled with couch, but the raspberries are free of it, and bindweed comes up really easily though obviously I must leave the odd bit behind! It seems like a minor miracle every year when the canes blossom, though, I do love my raspberries.