like email .6633 mentioned, the parking tickets may not be an issue. However, it is highly recommended that you get the driver's abstract from the state DMV. The driver's abstract from the state DMVs is necessary, and you can get it for your entire driving history in US. That said, if you have stayed in multiple states, try and get it from all the states if possible.
This is because in Ontario, like email.6633 mentioned earlier, the Ministry of Transportation will need these records from US DMVs (last 3 years is fine, entire history will be preferred) so that you can exchange your US license for a G license here. Not sure on how the licensing process is in other states, but in Ontario, if you are starting from scratch, you will get a G2 license, followed by a test and a G1 license followed by a road test. Once you have cleared these, you will then get the G license. So the overall process may take a long time. But they do exchange the licenses from certain countries and based on the records provided, they will either exchange it for G1, G2 or G.