We'll be doing some fencing in the next couple of weeks, about 100 metres of it, we haven't got the "right kit" either but hope we can manage the old fashioned way.
So we have a long steel bar on which we've ground a chisel on one end and a point on the other. This is our main digging tool and if needed we have a narrow spade for the big straining posts + a sledge hammer for gentle tapping! We looked at a post driver but it was really heavy (yeah I know it's supposed to be) and wouldn't have fitted the big straining posts anyway. We also looked at a post auger thingy but we want the holes smaller than a post so when the posts go in they're tight - apparently now is a good time for fencing as the posts go in easier in damp ground. (Yeah right
)
Good luck - spare us a thought too!
Ziggy