avvy danger is usually too high to ski it until mid-to-late spring. you can usually go as late as june. the snow is super super heavy corn snow, not pow. there are some cliffs dead center of tucks, but its rare that they get hit. there are some smaller cliffs in the drop skiers right of tucks, hellmans highway. its best to go early to mid april IMO. ive been many many times, skied tucks, hellmans, dodges, gulf of slides, finger chutes, gulf of slides is a fun one, but its a longer hike. not many people venture that far over.
just keep an eye out for 1 or 2 big death crevasses that normally form, and if you to tucks try to go all the way up to the peak of washington and ride the snowfields that lead into tucks if its any good. also, check this website a lot for updates on base levels and avvy danger.
http://www.timefortuckerman.com/
hope that helps