you may just need some practice. when i started riding fixed i had trouble getting into the clips/straps. After a week or so it was no problem. Also It helps if the pedals have a tab on the bottom (see:
http://harriscyclery.net/itemdetails.cfm?ID=453) That will help your foot flip the pedal as the crank is rotating. This is really a personal preference issue but what ever you choose foot retention is a must, even if running a brake.