I go to the beach all the time with my gear. For 1, I always use a sling type bag there, or any bag that you can get the camera in and out of quickly will do. I am constantly putting in away between shooting with it as opposed to keeping it around my neck always like I usually do. Be careful putting the bag down, if you do, put something down before it, like a towel or jacket if possible. You don't want sand to get in your bag, that's the worst of all. I don't use filters at all, unless it's for effect, I just try to keep the camera out of the wind. If sand is blowing around where you are, you'll know it. If something happens, something happens, but I don't let it affect my day at the beach. I'll change lenses if I have to, just try to be careful. Have fun at the beach with your brother and most important, post some pics afterwards!