If this is your first wild camp, I assume you may not be used to carrying heavy packs - and they may contain gear that is heavier than it might be. So I suggest reducing the distance to perhaps half that, maybe a little more (10 - 15), but I don't know how fit you are, nor what the ground is like. I suggest, too, that especially as this is your first such camp, you should try to enjoy it as much as poss! Don't be over-ambitious and curse the whole thing.