The carp will be active, regardless of spawn. Note that carp can spawn 3-4 times over the course of the summer.
My favorite area for carp is the campgrounds past the boat ramp. Large shallow gentle slopes, mostly sandy bottoms.
Fly choice is foxee clousers, woolly buggers, or large nymphs (10 and up). After you put your tube in start by fishing with cast to the shore, then work out to deeper water. Concentrate on areas with active fish, be it schools, jumpers, what ever.
I fish blind and simply put my flies on the bottom, then use slow retrieves in a stop-go fashion. If you don't hang up on occassion, you're not on the bottom. Keep your rod tip on the water and pointed at the fly. strike by pulling the line, then lift the rod. Fish 3 or 2 X tippet.
There's lots of carp at Jackson, and you're sure to run into one willing to eat. Colors: black, brown, olive, peacock are my preferences.
As to wiper, locate bait (work dam face) and rip streamers in the 2-6 inch class. I like shad colors, but black is a good option also.