i would be very careful about putting a roller over the outfield its more likely to compact everything rather then level stuff out.
try getting hold of a chain harrow and drag it round a lot. i have a football pitch on one side of the square it always looks a bit bare and uneven a serious chain harrow bit of seed and fertiliser it comes up nicely for the cricket season.
if they are that uneven it would be worth considering filling in the holes and putting some seed down or possibly even taking the turf up and level underneath.
it all comes down to time and resources available.
have a look at
www.pitchcare.com they have a brilliant message board on there. regular posters include the head groundsman from sussex, cardiff, durham and loughborough along with lots of other knowledgeable people