Hadn't really thought about a viking funeral, despite having served a navy hitch. But my funeral of choice would be a close variant, and is also something that can't really happen. My choice would be to be put on a nice big pyre of wood, on a little hill, and let the breeze carry the mortal stuff away; any bone that didn't burn could go in a little unmarked hole at the root of the nearest tree; if the location mattered to anyone, they would be one of those to know where.