Well my quest for the holy grail of chipmunk images starts to return the first results. I still don't get closer than maybe 8 yards of them and I'm covered in dirt after trying to sneak up to these little bastards. But at least I start to get reliable results with the tamron 70-200m F/2.8 + TC 1.4

now I just need to get 7 yards closer to them, maybe I should watch caddy shack again...