Hi Norwegiancarper,
The Carp do take boilies in Town Lake and I know a lot of people use them however in my experience I prefer to use corn or hominey as the Buffalo carp prefer smaller baits. This year I have started to specifically fish for the Buffalo's as before I would occasionally (as well as accidentally) catch one every now and then. Remind me you are coming a bit closer to October so I can make sure I will be available to show you around the lake and to fish with you.