Hello people, 

I am a first time Algonquin camper although I camped before in other parks. I booked rock lake site# 61. After booking it for 7th May i realized that it was right on the sandy beach. I feel like being a little adventurous so I am going to change the site to one of the "first come first serve" sites. My main activity will be fishing and I also dont wanna walk too much (not alone here). So i have picked the site shown in Jeffs map (at the "remains of lumber baron JR booth estate), on the Booth's rock trail. I called the park official today to ask what will be the fees for the switch and he said it will be free which sounded odd. 

Can anyone please tell me, Can I switch on the day of arrival? 
If yes, what will be fees? and switching cost? 
Where the car will be parked? 
How is the fishing at rock lake on that point? 
How is the campsite, if anyone has ever been there... 

I really appreciate the help and responses. 

Thank you