yeah definteliy if u read the park updates they say they will have winter til june 3rd top to bottom...and prolly true considereing i went to camp there last year and the lips of the jumps were still there and the half pipe walls were there too...so i am sure youll be fine
theres no point in going to the bottom except when i went there during the spring festival and on the last day i skied all the way to the bottom of whistler and skiied into a rock concert, it was dope