A 285/70R17 would be about 2.25" larger in overall diameter than the original tire. Generally speaking you can usually get away with an increase in overall diameter of 1" without modifications but any more than that and you'll have some work to do. A better 17" size to consider with your stock suspension would be a 265/70R17. This size is just over 1" taller than the factory tire.
As far as wheels go, 17" wheels with the correct offset and width should fit fine. Here's what our system says to look for in terms of width and offset ranges. These ranges will keep the wheel and tire within the wheel wells. Offsets lower than these ranges will push your wheels and tires out beyond your fenders. Offsets higher than these can cause interference with the suspension components and/or unibody.
2014 Grand Cherokee Overland