Village Festival - - song

[themonk]

Second verse:

年も　豊年　まんさく　で
村は　そうでの おおまつり
don don hyarara don hyarara
夜まで　賑わう　みやのもり

I cannot figure out the bolded parts.

The translation is as follows:
Having a fruitful harvest,
Villagers are all out to celebrate.
Don don don...
Til the night, festivities carry on in the village.

Thank you in advance.

[yangmuye]

そうで→総出, that everyone goes out

みやのもり→宮の森, seems to be a place name. It's grammatically modified by the preceding clause, but semantically the actual subject of the whole poem.