wow. Lots of advice here that is probably not pertinent to OP. Sounds to me (I may be wrong) that OP is looking for a one time bonus to maximize their large vacation purchase. A alot of the cc's mentioned here are inappropriate for that scenario
why? OP wants to get the bonus to help on a vacay that will be paid with a tax refund, it sounds like an ongoing use of whatever cc they pick isn't going to be important.
Cards with annual fees, (and high rewards) are fairly serious business,and take a lot of self control to handle well.And don't work well unless you are in a position to know that paying in full each month without going broke is worth the bonuses. If OP is in a position to do that, well then maybe- but only they really know. (A CSR Is a really bad choice for a one and done kind of deal)
A no fee disney card (or two), yes. a no fee chase freedom? sounds good. A SWA card, if you plane to do the above, plus have travel plans for the near future you could that on? maybe.....(see above note) and OP the 5% back is usually rotating categories, which can be great!