One has to remember that Alberta is quite urban. 2/3 of the population live in either Calgary or Edmonton. I'm thinking the last provincial election would be a good indicator in how a Dem-GOP race would result in Alberta with PC areas voting Dem and WRP areas voting GOP.
Many of those who vote for the Wildrose (including the leader herself) are socially progressive (in favour of gay marriage, pro choice, etc). So, they may not vote GOP. Trying to determine Albertan's American voting intentions is not as simple as trying to line up the parties. The Wildrose party in itself is probably one of the most difficult parties to define in terms of the right/left spectrum (other than maybe the PQ).
