Well coming down 111 just as you come across the lake there at Soddy Lake here is a decent ramp, wear your knee high muck boots so you don't get your feet wet if your alone... The next closest one I believe would be Chester Frost Park then at Chickamauga Marina / Dam.
https://www.google.com/maps/place/Ho...!4d-85.1424269
Also stop in Soddy Custom Tackle, they are crappie fishermen there as well, they could possibly get you headed in the right direction. The fish I found last week were in this area of Chickamauga as well.
https://www.google.com/maps/place/So...!4d-85.1557347
And you might need a rain suit, hope this helps.