Do most hotels hold your luggage until
check-in time if you are in town early? I don’t want to lug my luggage around for hours as i sightsee.
Some do, some don't. The best thing is to contact the hotel and ask.
I’ve never had a hotel not willing to hold my bag. I have a carry on suitcase, so it doesn’t take much room. I’ve asked ahead of time if I’m staying at a B&B type lodging, and they have also been willing to store it for me.
I have always done this, never had any problems.
It's always worked for me, likewise when checking out before leaving the city.
Yes, but many apartments and villas do not.
Any legit hotel/hostel/guesthouse will do this.
If its a vacation rental or similar - probably not