I knew a lady (she passed away a few years ago) who went there with the Holocene Impact Exploration Group (look them up). Very rugged and swampy indeed.
The following link is a google map view of Vanavara, the closest town to the impact/event: https://goo.gl/maps/jLKtXzzjM42zCJwe6
Lake Cheko, many think this is where some of the asteroid/comet may have actually impacted:
https://goo.gl/maps/bS9VBvep938mfnn27
And the center of the blast:
https://goo.gl/maps/gsxwqGBhQK7K2r7JA
Several years ago, I did a program on the event for my astronomy club and looked all this stuff up.
Thanks, useful information.