How busy honestly depends on the weather. Being a smaller park however it can feel busy but rides can be either a short wait or walk on.
The peak for this park ain't as bad as other parks (GC based). Usually what makes them busier, is the staffing arrangements. Running too low attendance (figures, this running lower staff numbers) when the park gets busier and it can't be changed accordingly.
The rides that usually have the biggest lineups in peak are,
•Wildmouse 30+ minutes
•Volarè 20+ minutes
•Sledgehammer 30+minutes (this ride has two queue lines much like pandemonium)
The only other slight issue that affects high capacity rides at the park is the fact you need to scan a wristband at the turnstiled to gain entry into each attraction. So, even tho would get told to put the band on your right hand many don't (scanners are located on the RHS of the guests at rides).
I'm assuming over the winter the numbers might pick up a little. The beauty is the Park is small. Having rides that everyone can ride also means everyone is somewhat spread more than we used to be when visiting before the upgrades.