>Has anyone every traveled to a launch

Yes, many tens of thousands of people have travelled to see launches.
But to make them the focus of the trip is to court disappointment.

Build a trip that has other goals alongside that - see KSC, travel to Key West, explore the coast.

All of these are (depending on where you're flying from) fair reasons to visit Florida - especially if you're currently enduring frigid temperatures.

<I saw an STS launch in the 90s - got a chance to hear Michael Foale, and had a whale of a time>