Our group has stayed at both,
I stayed in the cabin at the campground, $100 a night, But its not plush, Its good for what it is for, It has good heat, its clean, and has two bedrooms with two single beds each. There is a bathroom with shower ect, Kitchen with fridge and full size oven / stove. It is right across from the trail head and has ample parking. There is a pull out sofa also, We had enough room for an air bed between the two single beds to allow three to a room. It is a decent sized cabin.
I didn't stay at Brookside, But Adam will probably chime in with some info, He stayed there the weekend of the 5th. I did hear them complaining about the parking issues, They had trailers and tow rigs.