Get yourself a tube of a cream called 'Diprobase' on sale in most chemists in the pharmacy section. It is used by medical professionals and deals with a lot of skin problems such as exzema, dry skin, etc, etc. etc. You can use it to wash with as well. It is also a barrier cream so will protect your skin whilst you are in America.
http://www.netdoctor.co.uk/medicines/100004782 .html
It isn't expensive and if it works you can buy it in a large tub with a plunger dispenser. I get it on prescription!
It beats all the expensive creams and lotions that are advertised extensively.