You want to alert your credit card company that you will be traveling.
I don't use credit cards on a regular basis any more and last year I took a last minute, out of state (business) trip, and within 24 hours the card was frozen. I had triggered an unusual activity alert on the account, by making a large number of charges including electronics and some on-line orders not shipping to my home address, and originating from outside my usual area. The card company had called the number associated with the account (home) but of course I wasn't there, so they froze the account. I've since changed my phone number on the account to my cell phone.
I was able to call and straighten it out, but it was embrassing when my card was rejected at dinner. This had happened once before, years ago when I was traveling in Mexico and I couldn't get that card unlocked until I got back to the States. I was told to call and alert them if I was making international charges, but I didn't expect it to kick in for just out-of-state travel. It was an inconvience both times, but I all in all I would rather my credit card company was actively trying to prevent fraud.