Hi all, A friend and I are going to start duck hunting. We've reserved a day with a guide to show us the ropes, we'll be heading to the coast to hunt in a month or so. I have most everything I'll need, except for a proper shotgun. What kind of shotgun will I need? My initial thought is a standard Remington 870 or Mossberg 500 with a 26 or 28" barrel and interchangeable chokes; would that work well? I don't need to get fancy or anything, just looking for something to start with.