Exactly what Hungryrob said,
From the sounds of it, I wouldn't bother with a hide either - so long as your personal camouflage is good enough (remember face & hands). The rabbits are going to see you walking to the hide anyway from what you say.
Find a spot in daylight where you can get (hidden) under one of the hedges. Arrive before they emerge, and play the waiting game just like we all do. Don't shoot the first one out, rather wait until there are a good number - then shoot the ones nearest the warren, hopefully the rest will have no option other than to run for open field where you can pop them off later.
ATB
Ogri the trog
Improvise, Adapt & Overcome