Hi Chris,
I can't give away any special spots on the Squamish as they may be some people's cherished spots and they'd lynch me if I did. Asking for specific spots on the Internet is a bad idea anyway. Here's why:
1. Anyone replying to you and giving you specific information can be one of those trolls who have nothing better to do than mislead people online. Because they know the river very well, they could give you detailed information on a spot on the Squamish that looks good, but is basically void of fish. If you are not an experienced angler, you may spend a lot of time fishing it without realizing that there is no fish there. So you get skunked.
2. A spot that worked yesterday can be a dud today. You might get information from a kind individual who points you in the right direction, but you still get skunked because yesterday is not the same as today when it comes to river fishing. It can be better, but it can also be much worse.
3. Sharing a known spot on any river (but especially an ecologically sensitive system such as the Squamish will cause a lot of bad blood online. Heck, it even happens with some Vedder spots! There are just too many people online who get their knickers in a knot when you mention Judd or Axen Road. (hint, hint)
And you can still get skunked.
So, rather than me giving away some specific spots, I'll suggest you find a nice stretch of water and cast away. You want to target depths around 3 feet, with as much natural cover as possible (big boulders, logs, etc.). Don't cast too far, the fish are not in the middle of the river - they live close to shore.
I hope this helps, but if you get skunked, who cares?
It's part of fishing. Enjoy the crisp mountain air, the bald eagles, the beauty of the scenery. Catching fish should be just a bonus anyway.
If you at the stage when catching is more important than anything else, I suggest you wait for pink salmon season.
Cheers, Milo
edited to add: remember, no bait allowed - artificials only. If you fly fish, sparkly leeches are a good choice of fly, although you should try and 'match the hatch' with sculpin imitations. If you use gear, I'd go with nice flashy spoons.