tire clearances

I just ordered a set of 27 zillas on 12" sedona spyders for my 700. I have done a good bit of research and still a little unsure big I can go without lifting. I’m not totally opposed to lifting as long as its not too much stress on the bike. Im wondering if I can go to 28s without lifting and would those be ok on the clutch and axles. I do want the biggest tire I can go with to get it off the ground and able to run in deeper water. Bike is completely stock. I dont mud ride or trail ride but use it on a cattle farm and run in flooded fields duck hunting mostly.