Yes, yes, yes and yes!!
Seriously, though, all the places you list have great water all around them. Fish Creek tends to attract quite a few spin and fly anglers as well as a lot of rubber neckers and people asking stupid questions, that being said, I fish there regularly and rarely see others near me or if i do they (usually keep to themselves). Closer to downtown (zoo) access, i.e. parking can be an issue. Deerfoor extention bridge and Policemen's are all closer to where you will be hiding in Okotoks so less time drivng = more time fishing...
Enjoy the clinic!
P
<edit> river is totally fishable, in fact as you have probably read, best dry fly action in quite a number of years!