HAPPY HALLOWEEN!
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> Hello, it's me, again today,
>
> With some new clues for us to play.
>
> When hikers go hiking during Halloween,
>
> There's always a cool thing, a little green.
>
> So here are some letter for you to know,
>
> And sit back, relax, and enjoy the show.

- MDGOT
- YHTSMTMM
- APSIAPE
- YGWYPF
- YGAPMAFAYFHFADYTHTFAYGHAOTWFHFAL

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What is the answer?

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Hints:

- >!Only the fourth line of the poem is helpful. The rest is fluff/herring.
- >!Look at the tags!