The water taxi boards at the end of a path next to the pool. There are boats coming and going all day from a couple hours before park opening to the wee hours of the morning when the CityWalk club hoppers decide to go back to their rooms. It may be a 5 minute wait between boats (I can't remember for sure). At the time you would most likely want to go to the parks, at opening time, they tend to be very busy, and you may have to wait for a while to get on. We always found it to be quicker and more peaceful to walk. The walking path at the RPR is well shaded and it's not all that far from CityWalk; it comes out right next to Margaritaville. We even chose to walk back to RPR one afternoon when it was raining, because we would rather be moving in the rain than standing in a long uncovered line waiting for a water taxi to pick us up.