I have chains for my tractor I use in the winter. I have used them in really nasty wet conditions in the summer but feel the cons outweigh the pros off season. I suggest some AG or HDAP tires along with weight if you have hills. Turfs are made for driving on flat, smooth, dry ground. Here is a link for some DIY plastic weights. Much cheaper than buying ready made. Wish I had seen this link years ago.
http://www.tracweight.com/