We are getting married at Chapel Dulcinea at 2pm and then planning on a riverboat reception about 45 min away near downtown Austin TX, boat leaving at 5:30pm. Very intimate wedding of 50 guests. Family and close friends ( no small children). My biggest concerns are logistics and keeping everyone happy and entertained during the gap between ceremony and reception. Also we are doing a 3.5 hr cruise. I wonder if we should cruise for maybe a couple of hours and then be docked the rest of the time so any older family that may want to head out early are not trapped on the boat? Im also hoping folks stay in their formal attire and dont show up in shorts and flip flops to the reception. I guess there isnt much I can do about that though. Also the vendor asked that centerpiece be low and heavy...any ideas for that would be great! Would like to not do any heavy florals to save money for other areas.