Compose a personal reflection about marketing in Indigenous settings, including approaches for conquering hindrances to entry in commercial fishery and aboriginal communities, and express your sentiments on the impact and suggestions for these fields. Moreover, within this context, examine the issue of Missing and Murdered Indigenous Women and Girls (MMIWG).

As you write, take into account the Tahltan First Nation and evaluate what you have gained knowledge about, as well as the impact you can have. Provide guidance to Canada and organizations involved in these industries. Additionally, share your thoughts on the BC Government's adoption of the Declaration on the Rights of Indigenous Peoples Act in November 2019.

Note: Ensure that you cover all of the mentioned aspects in your reflection.