Hubba Hubba Highway is a fast moving river just like the one at Aquatica. You wear a life jacket and float in the water. It is difficult to stop yourself. Life jackets are not required, but they make the experience much more fun in my opinion, because you can easily float and enjoy the speed of the river. Most people wear life jackets. Those who don't are typically young teens who think they're too cool, lol. Water Country USA also has a more tradtional lazy river in which you float along in tubes slowly more slowly. There are single and double tubes and tubes are required. I love both rivers, one is exciting and one is relaxing.
To those who say three days at Busch Gardens is "more than enough," I wonder if you visit parks differently than my family does. I think three day is perfect, and I often use four days, to thoroughly enjoy every aspect of the park at a relaxing pace. Yes, you could enjoy the major rides in a day or two, but to repeat favorite attractions and enjoy the shows, shops, restaurants, and soak in the atmosphere, I think three days is ideal.
To the poster who said they wanted to spend two hours each in Water Country's wave pool and river, you will definitely need more than one day at Water Country if you want to enjoy all the other attractions as well. Many of the slides will often have lines from 15-20 minutes to 30 minutes or even 45-60 minutes for a couple of them. We usually hit the slides with long lines once, the slides with shorter lines twice, and spend approximately 30 minutes each in the wave pool and the two rivers, and that takes up a full day. There is also a show featuring divers and gymnasts that is well worth seeing.
As for the food, I think the food at Busch Gardens is excellent. It's a mix of food inspired by the countries of the park and American food, but all of it is of better quality than typical theme park food. I's say it is on par with the food at counter service restaurants at Epcot, but there are more American style choices. Grogan's Grille in Ireland, Trapper's Smokehouse in New France, Restorante della Piazza in Italy, and Festhaus in Germany are the largest restaurants that offer the best food choices. Festhaus has a separate line for "German food" and another line for pizza and burgers. Water Country has excellent food compared to most theme parks. Besides typical pizza and burgers at one restaurant, another offers many different deli sandwiches with sides such as pasta or potato salad and another has wraps and hot sandwiches such as grilled chicken cheese steak with peppers and onions that is very good. You can find menus on the park's website.