Too bad they aren't the Verizon Tracfones, or I'd be willing to take them off your hands.
I've never bought the minutes through the phone. I know there is that feature. I usually buy online, or I get a card at the drugstore to add on, then do it online.
Let me think,

I know that CVS and Rite Aid drugstores carry the airtime cards. Walgreens might also. Not to be confused with
WalMART, which also should have them. I think some Kmarts might have them.
Bring up a Google Map of Orlando and then just enter in the store names. You hopefully will find one close to where you are staying. Most hotel room phones will let you access the 1-800 phone numbers from your hotel room without any charges. So, you'd still be able to activate or add on minutes to your Tracfone.
Remember, text messages are 0.3 units per text - or 1 unit for each 3 texts. that is both sending and receiving. Don't go crazy with that QWERTY keyboard!
When you take pics with that phone, you should be able to download them to your computer, without using up minutes to send them to yourself. There is a tutorial online somewhere that should tell you how to do that. There are a couple cellphone reviewers that go through the ins & outs of the Tracfones when they come out.