I agree with a number of the points above. Although you may not "need" lockers to go up the Cape. You will certainly protect the tracks and your drive line (if used sensibly) having lockers.
We 4wders as a community claim to "tread lightly" but then go ahead and tear up tracks because we won't accept defeat. I have seen it quite a number of times very recently and it has left me with some sour thoughts towards a couple of particular groups.
If you have the money to spend on lockers, they are an easy thing to justify in my opinion. If I had the cash, I would be buying a set as we speak!
Chris

