I'm new - Pls help identify this snake!

[judicb]

Hi, I just joined this forum to see if you can help me identify this snake. I live on north central Vancouver Island where we have very few wild snakes. We only have garter snakes, but nothing like we saw on our walk yesterday. It was about 2.5 to 3 feet long and about 1.5" in diameter. Much bigger than our usual red racers. He was basking on an old piece of wood on a grassy/boggy part of the beach. Please can someone help figure out what kind of snake this might be - it may have hitched a ride here on someones RV - doesn't seem to be native to this island that's for sure.
Thankssss for your help!
Judi
Vancouver Island
British Columbia
Canada