You mentioned your daughter likes rollers and banks. There isn't anything that I would call roller or bank in North Texas. At least not as I would define it based on riding traditional bike parks.
One exception that kinda sorta has rollers, is Gateway. But it's not super close in FT. Worth. Might be worth the trip. It's a fun trail for younger/beginner riders, as well as those wanting to zoom and jump a little. Smooth and flowy, with manmade and natural humps, jumps, walls, banks, etc. Even some skinny and a seesaw. Nothing you can't ride around or roll over if you need to. Just don't expect bike park kinda stuff. I would, however, skip the east end loop. It can be steep, rocky, but does have some cool stuff too.
For a quickie, the short ride at Corinth Community Park can be fun. It's right there north of Lewisville and surprisingly remote feeling considering where it is. No banks or "rollers", but some dips and mild obstacles.
You mentioned Ray Roberts. Isle Du Bois can be pretty rocky. I would say its the Northshore west end times a factor of something. Johnson unit is the milder of the two trails at Ray Roberts. I would, however, skip the last loop at Johnson for the younger rider. It has a lot of rocky climbing, and again, more challenging than Northshore west. Both of these Ray Roberts parks are great riding, and are stacked loops, so you can make them a shorter or longer ride. And both of these parks have some concrete paths should you want to skip trail riding (too wet, etc.). Plus, there's the lake, hiking, picnicking, fishing, etc. More other stuff top do. Makes for a nice there.