I am having the same problem. Have the manor, PS3, no wolf. The plot-is-here arrow just hovers over the ground. Tried loading with a previous save, attacking the spot and around the spot with arrows, spells, and weapons... Nothing seems to work.
I'm getting the exact same problem too. I'm on PS3, I built Lakeview Manor, I go over to the location for the wolf, and although three normal wolves attack, an arrow just hovers over those deer bones in there and the guardian wolf never shows. What a jerk, standing me up like that.
It's annoying cos this is the character I specifically did a "hunter" build for.
Anyone know if the problem is caused by building the manor before doing the trials?