At the resorts with 24-hour bell services luggage should be delivered throughout the night, as PPs have noted, unless you arrange to have it held until the morning. If you want to do the latter, I would suggest notifying bell services directly AND putting out your do-not-disturb sign just in case they lose or fail to heed your instructions. Note that at the value resorts luggage services closes at some point in the night and won't deliver bags until the morning.