Hi (((Gina)))
I think there is a way to state to your H what your concerns are without being "mothering" or controlling.
You can let him know calmly and clearly that, given everything that has happened in your M and how fragile things still are, that you are going to find it difficult to relax and trust him Sat. night. Ask him what he would be willing to do to help that situation? Let him be a problem solver. Maybe he will suggest calling you a few times or something...
At least this way, he will know how you feel. You are not controlling, you are not forbidding him... but you are stating how you feel.

HOwever... I am also with Puppy that I would definitely consider a drive by or gps in a sitch like that....

You know that, as Puppy says, "Cheaters Lie" and that becomes a habit that takes a long time to change, even when they are sincerely wanting to work on the M.