You WIll need the extra flotation tails. Go for the 8 inch ones.Really it all depends on snow conditions. If you hike where it is snowpacked, then all you need, even for hilly terrain, are the Denali Classic snowshoes. However, if you find yourself in deeper snow, you might need tails. I always try to get away with the smallest snowshoes possible because they are lighter on the feet, easier to maneuver in, don't drag behind me as much, and allow me to pick myself up after a falll. The general rule is if your in 30 inches or deeper of powder snow, you probably need tails. Otherwise you should be fine. The five equal qualities of the Denali Classic snowshoe are: traction, durability, float, field maintainability, and modularity. Personally I would give up some float for maneuverability, weight strapped to my feet, ease of walking in, etc., but that's me... The great thing about the Denali Classics is it's up to you! If you like a longer shoe and believe float is important, throw on the tails. If not but would rather have an easier time hiking through the snow without fighting the extra length, don't use 'em. Beautiful!----I still disagree - 30 inches of fresh is unheard of in the east. I needed 4 inch tails to stay near the top and off of the rocks underneath. Now that I live in utah, I find that the 4 inch tails work well because I am less worried about what's underneath. I still think I should have 8 inch tails when I carry a heavy pack.