As to shrimp, be sure the bait shrimp is from the Gulf only. Any other shrimp is now illegal to use for bait in Texas. See <
www.tpwd.texas.gov/baitshrimp>
Depending on what your jugging for in Granbury, you can also use my Catfish Calendar to key in on them. Mainly for Blues, Yellows, and Gator Gars. However, the KEY for 2021 has a suggestion as to Channels that might help. See the thread "Lynn's Catfish Calendar". Also note that Bleedover works both ways, up to 12 hours before or after a given calendar day.
I use a one gallon bleach jug, or the really thick opaque gallon tea jugs. Depending upon the depth of the area I set the jugs in, I have the leader to where it just touches the bottom & have from 4 to 5 leaders on the main line. I use 4/0 SS or 3/0 Brass barrel Swivels, but not the ones with the clips. I tie a weight on the end of the main line. I use vinyl drinking cups filled with concrete, with a galvanized loop protuding out of the concrete to tie to. Plus I slit a little hole in the top side, to run some cord thru the cup & the loop to make sure the cups & concrete stay together. The cup protect the boat, as well as the concrete, plus it makes sure we do not litter the bottom of the lakes & rivers with plastic or vinyl cups. If you have problems with people mowing over your jugs, spray about a third to a half inside your jug with spray foam. This will assure if damaged or gashed, that your jug will still float. I also double round the cord of the main line to the handle before tying two knots & snugging them. I also make my knots on both ends of the main line & leader lines. I burn the fray to seal the knot, aka prevent unraveling.