Stop the Tunnel member Trish Fraser said the group received a letter from the local government and environment select committee inviting it to submit ''specifically'' on the process of applying for Doc concessions.
''We're definitely keen to submit on that because we have a lot of concerns about the process,'' Ms Fraser said.
''We don't know how a project like this got off the ground.''
New Conservation Minister Nick Smith was formerly a member of the local government and environment select committee before his ministerial role.
Former minister Kate Wilkinson delegated the decision-making for both projects to Doc deputy director Sue Cosford.
The Stop the Tunnel group supports Dr Smith's decision.
''It should not be left to a public servant,'' Ms Fraser said.
She added that being a minister, Dr Smith was more likely to consider the projects' impact on the wider community, including Te Anau which would lose business from the diverted tourist path and Glenorchy which would have ''80 buses clogging up the roads''.
She said members from the Stop the Tunnel group would travel to Wellington if the group was invited to speak on behalf of its submission.
In a statement sent earlier this week, Dr Smith said he would visit ''the affected areas'' and Ms Fraser hoped Prime Minister John Key would also visit.
''I mean, he is the Minister of Tourism and the impact of this on tourism could be huge.''
