Moving with two cats who are now indoor but will be outdoor--suggestions?

We currently have three indoor cats, because the road we live on is too busy for them to go outside. When we move, we will be on a cul de sac and two of them can go out. (The other is Himalayan and will be staying in.) We will be putting the two going out on Revolution to prevent heartworms. We're hoping since they haven't ever roamed outside the old house that they won't try to wander back to it. Has anyone ever been in this situation? If we keep them in for a couple of weeks first will they stick around? I'm getting nervous about this move! Thanks!