I remember something from a few years ago. My family and I were staying at the Rest and Fly at ARN the evening prior to flying back to the US. In order to wear out the kids, we walked all the way from the hotel (in T3) to the SAS check-in desks in T5.

I inquired if the ARN-ORD flight was oversold. The check-in agent also asked if we wanted to check-in for our flight; she also said we could also check-in our bags. This would've been about 14 hours before departure.

With that ammo in mind, I was wondering if I could do the following...

We are most likely booking a room at the Radisson Blu Arlandia for the evening prior to our ARN-EWR flight back to the US this July. We will be arriving from the Arlanda Express. We want to check-in our checked bags (and get boarding passes) that evening, then take the shuttle (with our carry-ons) to the hotel. That way, we wouldn't have to schlep the checked bags around as much, and we could also wake up a little later and go directly to security.

Is that situation still possible at ARN? What time do the check-in desks close (on a Sunday evening)?

Thanks in advance.

Edited to add: this is thread #6999 in the SK forum.