Agreed; sunburns can just infected just as any other wound.

I didn't include that in my post because it really depends on where he lives. In a desert or maritime environment, the risk of sunburn is a lot greater than if he was in the middle of the woods. If you are in an environment like that where the risk is high, then absolutely carry some.

As far as triangular bandages and sterile dressings go, it really depends on how much space he has available, which is probably not very much. I fit a few 2 x 2 pads into mine, but there probably isn't room for a triangular bandage, as small as they are.

I include some first aid items in my survival kit, but it's by no means a first aid kit.