Like said above, wheel spacers are just another added part. They are not bad if you take the right precautions with them. Some people swear that they ruin wheel bearings prematurely, I honestly think it's a joke. Yes, there is added stress to the hub since your pushing the weight further out but I do not think it's anything these trucks can't handle. I've been running 1.25" all pro wheel spacers for a couple years now and have not had any problems with them. Use extended thread lug nuts to bolt spacers on hub (see picture below), use blue loctite, and torque them to spec. Everything will be fine.
As far as driving with them, it will be something you'll get use to very quickly and forget you even have them on. You might have to do a little trimming on the pinch weld but 5 minutes with a angle grinder and you're done.
Now I don't know if you actually need them, but sounds like from the people running 285's and aftermarket wheels and even some oem wheels, you'll need them.