Info on Dollywood Splash Country

Hi. My friends are wanting me to go on vacation next week with them to splash country. I've never been and am nervous. I'm pretty sure already that i can't do many rides due to my size. Can anyone tell me if there are things that i would be able to do? Can you just swim or do the lazy river without sitting on a tube? I don't want to spend all day just sitting in a kiddie pool but i have no clue and most smaller people don't understand the concern or know what to look for. Thank you!