After Disney revealed the location of the Star Wars hotel and the fact that it will be seamlessly connected to SW:GE, it's obvious that there is way more going on here than theming and role-play. The missions that guests will have an opportunity to go on will no doubt be guided excursions into the park. If you have ever gone on one of the private tours or VIP experiences than you know how this works already. If this is the case, then we can also assume that there will be exclusive experiences/areas of the park that only guests on missions will have access to.
So, I imagine that the price for staying at the Star Wars hotel will include the CM guided tours (missions) and access to exclusive experiences.