If you go to Silver Springs, go downstream and just past the plano bridge on your right you will see a creek. There always are some carp in the mouth of it, and in it you can find some real good quillback suckers. Be REAL careful what you shoot at though, there are some big musky that hang around there too. They are long like a gar, so dont make the mistake. Pretty hard to mix them up though as the musky is much fatter than gar.
Also, work the main rivers banks slowly paying alot of attention to any debris piles. The carp really like them. The river itself is real muddy due to carp feeding heavily. I remember being on a boat out there and seeing a huge mud plume coming down river. I thought it was a boat motor that hit bottom it was so thick. But nope, there were 6 carp feeding in the mud. Really demonstrated how these fish damage the water. If 6 did this imagine what the thousands in there do daily.
DCA is a great place for a boat your size to, especially in the spring!