Picture posting is enabled for all :)
If you still want to try direct sowing, an old trick is to make a drill and then sow the peas along with cut gorse before covering and watering. The theory is that any burrowing rodent will encounter a sharp spike in the nose and give up before it gets to the peas. I haven't tried this method though.
I have the same problem which has put me of growing peas. Using guttring is a good idea but I would need a lot for a twenty foot row.