M.
Hi D.,
I had this dilemma myself last summer. I looked online for reviews at Amazon/Babies R Us and settled on the Swim School: Baby and Me Float. We used it a couple times last year and I plan on using it again this year(my son is a little on the small side). It helps if your son has a bit of meat on him, so he can't fall through the leg holes, but this one is so nice because he sits in it and it wraps around you! It has a couple of toys that he may or may not like. I really think you should look into this one. I advise that you try blowing it up BEFORE you go away, though, as I had a bit of a problem and I wouldn't want you to not be able to use it.