heyyy.. umm i go to frankston alot on my motorvert 125......the entry is $15 for 50cc to 65cc i think.. and then it goes up to $25 for 125cc and up...
and no you dont need a license to ride there.. you just have to go there and grab one of there daily forms.. fill it out and your on ya way.........
and the times they are open on weekends, saturday: 10am-dusk sunday: 10am-dusk
hope that helps!! cheers!