A bus will pick you up and drop you off at your hotel. Most are all day tours. Tulum to the ruins usually includes a swim in a cenote and lunch prepared in a small village. Xcaret and Xel-ha are parks where you have meals provided you can zipline, ride 4 wheelers, swim, snorkel, canoe. Tons of stuff to do in them

I usually do 3 tours then spend 3 days at the hotel but I’ll go into town 1-2 of those days for a few hours. Plenty of people never leave the resort though. They have activities in the pool, go to the Beach, movies, game nights, etc. they always have something going on for people staying there.