Pre-Production major project: Keeping Actor interested

We finished auditions in October now thats over 3 months till the actual filming in February, in this space of time people can forget, feel ignore and lose interest in being apart of our production so we have to make sure this does not happen and they keep motivated and engaged in our production.
We planned on doing this by having them come to mini events such as:

• Filming the title sequence at the end of November 
• Doing a Photoshoot at the beginning of November 
• Recording the table read at the beginning of December 
• A regroup after the new year 

By doing these we hope to get the actors more involved and enjoy working with us, although the more the actors come and meet us to do this activities we are providing them with the travel they are then engaging into the script and seeing it unravel and get he feel and emotion to built up to next year where we are on a time limit, and I feel the better the actors relationship with us the quicker and more effectively we can get the filming done in our time scale.