Well I went to BGT on thursday march 8 last year, and I thought the crowds were gonna be horrible because there was this huge line in front of the gate. As soon as I got to kumba and montu though, it was a walk on :) !! I got in about 10 rides each, for you I would probobly expect lines at the most 15 min just because its a weekend, have fun :) and make a TR when you come back!!