I don't prune any of my raspberry at all during growing season but I do prune them back just before winter.
I throw grass clippings in between raspberry rows to keep weeds down and to add some nitrogen. Water is key when growing Rasberrys also.
Last season I took my mower to my raspberry patch and mowed away. Not to worry though, raspberry are very hardy and keep returning every year, Thanks Be To Almighty GOD.
As far as snails, we don't have that problem in Michigan.