Yeah, most places will accept the US dollar, just know what the exchange rate is before going there. But I know you mentioned you didn’t want to carry large amounts of cash on you. When I travel I usually just use the credit card...my card only does 3% extra...not too bad. I know the ATM is also an option, there is no currency exchange fee, just a bank fee (usually $5). When I went to Indonesia, I actually paid for most of my trip before I actually went there which was nice. I just did a money transfer of funds to cover the cost of hotel/diving/meals so I didn’t need to carry a ton of cash on me. Some things to think about. If I was going to Belize, I’d probably just bring cash and use my credit card when necessary. I get travel mile for every dollar spent anyway, so it’s money going towards a future trip.