i rented the 100-400 before also, for jiao park and bei ho (did you watch the news, the white tigers killed one of the crazy suicider zookeeper?). Its a beri good lens, but seriously, go SBNR, is really luck base, rent lens go there risky, later no objects worth the $$ to shoot ahaa.
hi butties... what have i missed?
Trust me, I'm not so bad! | TangShooters
You can try this
their service is not bad.