Well, you can see the launch from anywhere in the Central FL area, even from clear across the state. Obviously the closer you are the better the view. I think if you have the time, and the shuttle launch is important to you, it would be worth making the drive over to KSC, and watch from the grounds. When the shuttle program was pretty new, we drove over from Lakeland one night for an early morning launch. There was me, age 7, my parents, my uncle, and my 8 1/2 mo pregnant aunt, all crammed into a Toyota Tercel, sleeping right there in the KSC parking lot. When we woke up in the morning there were about 50 other carloads of people doing the same thing. It was great fun, and the launch was spectacular from that close range. Everyone should see a launch from there at least once.
Just promise me one thing...if you don't end up making special arrangements for viewing, and you happen to be driving down I-4 at launch time, and you want to stop the car to watch....PLEASE pull off the road. You have no idea how many times us poor central FL people will just be trying to get to work on time on launch day... and traffic will suddenly come to a dead stop as people stop their cars right in the middle of the travel lanes to watch. Very disconcerting!