An official with Lake Lanier Olympic Venue is predicting there will not be enough hotel rooms available in Gainesville and Hall County to accommodate visitors coming to next year’s Dragon Boats World Championship sanctioned by the International Canoe Federation. Morgan House, manager of the Lake Lanier Olympic Venue, told The Times on Thursday that the approximately 2,000 competitors expected will help generate “enormous economic impact” when they show up for the world championships in mid-September 2018. “It would be extremely large because athletes would come a week before the event and the event lasts four to five days,” House said.