Hi there, is it possible to check luggage the day before?
If not, is there somewhere at the airport to store suitcases conveniently?

I ask because my current plan is to arrive at ARN from LHR around midday the day before my flight to DOH.
I don't want to take luggage to the hotel if I can avoid it.
The flight to DOH is likely to be the 22:40, so I don't want to have to return to the hotel just to grab the bags, would prefer to sight see Stockholm and go directly to the airport with just our light hand luggage in the late evening.

Thanks.