We just went to a wedding in Pocahontas state park. The actual wedding site was nice quiet and secluded but the reception hall probably would not fit 150. But that was just the one we were at they might have larger dining halls.

Amber Grove out in Moseley is nice and has quite a bit of room, but not sure of the pricing.

Also ask Maymont park owners for their rates.

Edit: didn’t read the indoors part. But I’ll leave my suggestions.