You can't bank fish anywhere around the marina. Bank fishing in general is still very limited there, but according to a recent newsletter from KDFWR, that's going to change somewhat, in the future (I added the boldface):

http://fw.ky.gov/pdf/newsletter0111.pdf

During November, the Department
completed the acquisition of a threeacre
tract of land at Guist Creek Lake.
Guist Creek Lake is a 317-acre stateowned
impoundment in Shelby County.
The new three-acre tract is located in the
upper arm of the main tributary of Guist
Creek where Hwy 1779 crosses the lake.
Ultimately, the desired use for this tract
of land will be to develop a parking area for
bank angling access to the lake, as well as
the construction of a new fishing pier.
Central Fisheries District biologist
Jeff Crosby has helped manage this fishery
for more than 15 years. “Guist Creek Lake
is one of the premiere bass fisheries in central
Kentucky. Its reputation is for quality
largemouth bass, not numbers.”
Crosby believes that anglers at Guist
Creek Lake can expect another good year
in 2011. “Anglers should experience a
high number of 15-inch and larger bass
at Guist Creek Lake in 2011.” While the
densities of 15-inch and larger fish are
on the increase, Crosby cautions that the
abundance of really big bass (20 inches) is
about on par with previous years.
Guist Creek Lake also contains a
good population of hybrid striped bass.
“The potential for a trophy hybrid striped
bass is always there. This past fall, we
sampled numerous fish in the 20-inch and
larger size class.”
The Department currently owns a 50-
foot buffer around the entire perimeter of
Guist Creek Lake. Unfortunately, anglers
must gain landowner permission to cross
private property in order to access the buffer
in most places around the lake.
Crosby believes that catfish and
panfish anglers will benefit most from
the development of the new bank fishing
access. “We have manipulated stocking
densities of channel catfish over the past
several years and observed a big response
in terms of the quality of the catfishery.
In conjunction with a 12-inch minimum
size limit, the modification of stocking
densities has really helped to increase
the overall size of the average channel
catfish at Guist Creek.”