I made this bedding set for Bitty Baby for a Christmas present. It was a quick and easy sewing project especially with the shortcut idea for the quilt! I've made similar bedding sets for American Girl and other 18" dolls and they work great!
Spring Dress for American Girl Bitty Baby Doll - Pink Polka Dots & Floral
Bitty's Travel Seat Item# V8085 Bitty Baby can travel in comfort with this cushy seat, featuring a lap belt to keep her safe, a collapsible sunshade with furry trim, and a handle that folds up for easy carrying. $42