I love the capacity wristlets, but if you want a slightly cheaper alternative, and your near an outlet.....
They carry wristlets with 1 main compartment and a magnetic snap outer pocket. I just got one a few months ago for our trip to Orlando, and it was perfect. Fit my iPhone in the front pocket, cards, cash, keys and my very small camera (fits in an Altoids box!) as well. Best part - $39 at the outlet! I just felt like I didn't have to worry about it as much as a $98 wristlet! I think that they make these specifically for the outlets and they come in a variety of colors. The latest one I saw is in that really cute tweed-ish plaid. (Like the scarf in the picture) I really like the outer pocket for my phone - I feel like I don't have to scramble for it and worry about dumping the contents of the wristlet fishing it out.
Good luck and have a fun vacation!