Going to the zoo - which lenses to take?

Leave the heavy 70-200 at home and take the 70-300 Tamron? Take the 50-150 Sigma? Should I bother with any shorter primes? Throw the 16-50 in the bag?

Was thinking about doing the 50-150 initially to see how that goes, then perhaps the 70-200 on a monopod, and some handheld video / pics with the 16-50.

Take the 58 AM for fill flash? I'm thinking yes.

I normally just do video the entire time at the zoo, but I'm really enjoying taking pictures with the A77.

Columbus Zoo if anyone cares.

Thanks!