Yonks ago I used to take USA traveller's cheques when travelling in US. Safer than cash, no hideous credit card charges and good for budgeting. Haven't been to US in over 10 years and now have a dc and DH in tow. Can you recommend an alternative to traveller's cheques? Thanks
Take a pre-paid currency card. I use Caxton FX. You get a good rate, you can load it online and it works in exactly the same way as a debit card. You can withdraw cash from cashpoints, pay by card where needed and it's easy to use.
We had two preloaded cards - one in my name and one in my husband's - from the Post Office. You can buy them well in advance then put extra money on them either in a Post Office or online. When you're in the US, you can use them just like a debit card to pay for stuff or withdraw cash. If you don't spend all the money on it, you can ring when you get back and they let you cash the cards in for sterling. They worked brilliantly for us.