Big Seven Lake is approximately 170 acres, 11 feet on average it's located in Oakland County Michigan near Fenton. The lake is accessible via Seven Lakes State Park. According to reports available via the Michigan DNR page the lake has a "moderate abundance" of carp present in the lake with some growing to "appreciable size".
Whether or not there is significant boat traffic on this lake is unknown to me, but there is a "no wake" rule on the lake that is enforced. The Michigan DNR maintains a boat ramp accessible by paying the normal user fee for entering the park. I find jet ski traffic frustrating when I'm fishing, so the "no wake" policy sounds promising.
I haven't fished here yet, but I've added it to my list of "want too" lakes this spring.