If your bags are already tagged through to LAS just bypass the lines and go to bag drop.

I’ve never checked bags with HA domestic so can’t speak for how is that, but I’d think there should be a bag drop. HA is really backwards though, operates like it’s the 1980s still. No such thing as online checkin for any intl flights, ever, to or from anywhere. For domestic there is reportedly OLCI, so there should be a bag drop also. There are frequent systems outages and ground stops due to Stone Age systems down at HA, and flights cancelled due to lack of crew, so if you are unlucky your 4:45 connection may turn out to be quite a bit longer.