I can see you've been busy here. 
Some bushes, or maybe hedges as 'crowd control' where people have to queue for attractions will be nice. Also some textures where the grass is slightly gone and the soil comes through on places where onlookers tend to stand and watch some of the rides would work well, I think.
All in all, it looks quite convincing allready.
Greetings from nighttime Amsterdam,
Jan

Some bushes, or maybe hedges as 'crowd control' where people have to queue for attractions will be nice. Also some textures where the grass is slightly gone and the soil comes through on places where onlookers tend to stand and watch some of the rides would work well, I think.
All in all, it looks quite convincing allready.

Greetings from nighttime Amsterdam,
Jan