Agree you can ask Housekeeping for more, but sometimes when we go to the pool, we bring some towels back with us. (We usually take them back the next day and put them in the return.)
FYI - we had trash service daily on both our stays this year, even though they said we’d only get it on the 4th day. 
Sometimes people leave trash outside their room (especially pizza boxes, room service items, etc.) and it does tend to disappear after a while.
It’s a nice gesture to Housekeeping to run the dishwasher last thing as you leave so they can put away clean dishes for the next guests. But it’s not obligatory at DVC. At other vacation club properties (like Marriott), it is expected that guests will run the dishwasher upon departure.
If you have this mindset, I’m sure you will be a great guest! Be careful about extra noise, especially during sleeping hours. Observe all Covid protocols. Leave a tip for Housekeeping - here’s a thread where we discuss Gratuity in general. There is no hard and fast rule - it’s up to you to decide amount and frequency.
Have fun! DVC Rentals are a great deal. Just be careful … you could be an owner soon! 