I have a large enclosure, with several easterns of different ages etc., and the mature males will chase anything that they see move. This could be a mature female or male, or an immature female or male, it doesn't seem to make any difference. And they will mount and get their feet stuck, without any cooperation from the object of their attentions, unless she's in the mood.
The males seem to emerge from hibernation in ready mode, and stay that way until fall.
I do agree that they have a great sense of smell, I just haven't seen any indication that that is the predominant sense used in finding a mate, or that females emit a particular scent at a particular time to attract males. Given their ability to store sperm, such a signal may be redundant, making them opportunistic in more ways than just their eating habits. 
I see thesis material here...
Regards
stephanie