Spitfire - I would be tempted to ensure that OFT will get you a visa for your training before you attempt to enter the United States - and also ensure that OFT will be there when you arrive.
OFT currently have two outfits - both of which are now within Class B airspace....which is closed to all VFR traffic.
I'd also ensure that you can convert your licence for use in the USA - unless you already have done.