Is a second date that's too similar to a first date bad?

First date went well we were together for 7+ hours the vast majority of that date was spent on the bank of a lake.

Picnic style: we ate sat on a blanket and talked for ages.

Background I know this girl from High school we are both two years removed from high school.

More on Her and I: in high school i told her i like her but that i didn't know what i wanted, IE i chased sluts and other girls for the rest of senior year luckily i stayed true to myself and didn't give it up. I'm pretty sure she is serious about relationships like me.

Date is this Sunday only thing i've planned to change thus far about the second date is we will go to a framers market before her and i go to a cool restaurant and to the lake.