I'll second what Cortland has said. You definitely don't understand this overall situation well
enough to start messing with the population. Just because you think the population looks small doesn't mean it is - only a few rabbits from a colony will be above ground at any time and they love to make use of cover so won't all be visible. Also, the population will be in balance with the surrounding pressures on it - foxes, birds of prey, diseases, available food supplies and farmers with guns are all working to keep that population down. Farmers have good reason to feel aggrieved about rabbits on their land; one place where I occasionally shoot is overrun with them, to the point where their pasture too dangerously uneven for their horses and the rabbits eat so much of the grass that they never get a
hay crop either!
Bunnies breed like bunnies - you really don't need to do anything to encourage them.
If you are determined to hunt for the pot, using snares or whatever, why don't you talk to the local landowners - they will probably be delighted to have someone else helping control their problem.