Whats the best way to pay for hotels in Cambo. Cash or credit/debit, US funds....does it make a difference?

Everyplace takes cash.

 

Most places in Phnom Penh and Siem Reap  will take credit cards but there may be some exceptions, mainly cheaper guesthouses. Outside of main cities, many hotels will nto take credit cards.

 

You can also book and pay online using a servcioe like Agoda and use the voucher.

 

Up to you, as they say.