I replied with a link to a picture i took last Thursday of that spring just before the turnoff for dollar lake but it never posted.
It’s there, and there’s plenty of water in the little trail-side pool. you’ll have an easier time of it of you have a filter with a pump. Would be hard to fill bottles directly from the puddle.
There was a good bit of snow at higher elevations, which may well still be around in shady pockets, so you could melt that too. A week ago, it was mostly above 9,500 ft. Plenty on Charlton and Little Charlton.