Mt Whitney Zone Forums General Discussion Help with Mt. Whitney conditions in April.

Yes, you can hire a private guide.

http://www.sierramountaineering.com/

Or these folks (I did a private 1-day mountaineering class with one of their guides that was terrific).

http://www.sierramtnguides.com/

Be warned: private guiding is expensive. Less so if you put together a group of 4 or so.