Yes to all, I carry 1/3 to 2/3 tank of Fresh water. I have had few sites with poor water.
I like my black and gray tanks to slosh and break up solids before dumping, so if they are less than half full, I do not dump them between campsites. I do have the advantage of a State Park about 20 miles from home, so I can hop over and dump after returning home. If the park is closed for the season, I dump on my last stop.
Finally, parking gets easier but remember, whether it take one try or ten tries; the camping rate remains the same, you will not be given a certificate of achievement for parking on the first try and the fact that you needed more than one try to get parked, does not show on your permanent record from high school.
Parking gets easier but it is simply not all that important.
Safe travels