Tons of vacation rentals and hotels (www.galveston.com, 866-505-4456). —Port Aransas, Texas Port A, as the locals call it, is an exuberant spring break spot, a slightly ramshackle beach town featuring huge souvenir shops that stock. KINGSPORT — About two dozen local high school students headed to Myrtle Beach at around 6 a.m. today. No, they are not taking an early spring break, but instead are members of a FIRST Robotics…