I have spent a fair bit of time down in that area looking to fill a cow tag last season and from what I was told by the numerous farmers that unless you have a strong wind from the East and it's minus 20, along with a hard packed snow, you will not see the big herd from Waterton leave the park. If the conditions are right, you will probably see anywhere from 40-400 elk in the farmers fields.
We had no trouble getting permission from the various farmers, only one fellow outright refused us. One farmer had a bull tag of his own and did not want us to go in a particular area-that was okay as we had cow tags. He let us on other parts of his land without any difficulty.
There are other smaller herds, I was told of one in the Oil Basin area, but never was able to see them. In addition you might find a few elk here and there, but for the most part they are pretty comfortable in the park boundries.
I spent a solid 6 days walking/driving/spotting with my rifle last season, but the weather was always pretty nice. Saw lots of deer and coyotes, but was not able to connect on an elk
As for the map issue, order a county map from the County office in Pincher Creek, photocopy the bottom corner where 300 A is and then draw the boundries of the park and the zone to the west and the Drywood Creek to the North. Then start knocking on doors. Nice folks, nice area, nice weather and no elk!
Keep us posted and good luck with your hunt.