you could always do like a handfull still do,,,, cheat, open a second account with the wifie's credit card and book the site as soon as possible, then roll over the booking rotating back and forth from her to your account and cancel as soon as possible so you don't loose to much money ;)
or book it a few days before your actual arrival day and cancel the first few days later.
over the past couple years I have found a booking from sunday night forward to be one of the easiest to get, I usually watch for the previous 2 to 3 weeks the pattern of bookings, how heavily it is filling, whether its weekenders or full week plus res's pick several from 1 to 10 and be on and have everything entered at 6:59 am, and wait till 3 seconds after 7 (using the governemnt of ontario's clock).
I just came back from 10 days at inverhuron, a nice site with the lake just on the other side of the trees from us, I opted to arrive thursday instead of friday and have to be challenged by all the friday bookings that would be occurring. was the second choice site, our first choice was booked for a couple weeks a few days before we did our booking.
I know the parks are making money off the cheaters now with extra charges, but personally I think they should automatically loose their reservations for the year and be banned from the reservation system for 2 years, and loose 50% on any changed reservation automatically from that point forward. It does make it harder for the rest of us to get a booking at all in some cases, or to get that 1 out only 5 water front sites at all, ,,,, and when you arrive its empty and you find out that the person changed their booking at the last minute taking 3 days off the beginning of their stay,,, if they had not done that you would have gotten the site
