Some 1.5 million certifiable celebrators will not spend the Fourth of July weekend incinerating hot dogs, guzzling six-packs, igniting fireworks, sailing, surfing, getting tennis elbow, dozing over portable TVs or lallygagging in hammocks. They are the indefatigable, demanding, endlessly seductible fun seekers of all ages who, defying summer's sweat and inflation's bite, will push through turnstiles to troop and whoop through the nation's three dozen major theme parks.
"It's not that often you get to see a rhino in Florida."
Visitor to The Dark Continent, Tampa, Fla.
Theme parks from Anaheim, Calif., to Arlington,...