Grampians for two nights - yes or no?

Pros:
- fishing for dinner
- meeting new people, which I haven't done for a while...
- canoeing, cycling, physical activity
- scenic views
- pyramid-shaped cabins (?!)
- cheap (less than $80)

Cons:
- if I go, I will be left with literally no spare time on my holidays for study/relaxing
- don't know anyone there except Megan, Matt Yong, PG
- be able to spend less time with brother and Dad who are both on holidays at the moment
- distance. Grampians is a four hour drive, I hear..