Hi mate,
All the above is sound advice. You could always give lamping a go as well you have got a better chance of getting close to the rabbits with out being seen as long as your quiet, or if you don't mind an early start you could always try getting into position under the cover of darkness and waiting for the sun to come up. Either way buddy hang in there I am sure you will figure it out, would be interested to here how you get on.
ATB Si