It was my intention to simply fill the barrow using a spade but wondered if I might be missing something that could really help matters?
I've got a 1T engine hoist and can't help feel that could play a role - perhaps by hoisting the bags in the air and my ripping a hole in the bottom above the barrow? Of course, it sounds straightforward but is bound to either not come out or will end up with the whole lot burying the barrow in one go.
Any tips or other words of wisdom? Even simple things like slicing into the side of the bags and shovelling from there rather than from the top?
If you can get help, try and get extra barrows too. BTW, you can hire conveyors if it's practical to use one. A pointy shovel is much easier to use than a square mouth one for a job like this. (Sticks into the soil much easier)