Originally Posted by Schnit

Just call the hotel now and let them know your husband will be coming before you and you give permission for him to check in on your behalf.

Also since he is on the reservation he should be fine. Just to be safe, I would install the Hilton app on his phone, in case they have digital key. If he goes straight to the room and avoids the front desk they would never know you werent there and you will get everything