In mid-October, I went to Hubbles Lake to find the public access through crown land (thanks to Bevin for the tip). The easiest access is on the east end through the Allen Beach Resort, but they charge a day-use fee, are only open in the high season, and sometimes restrict access.
While there is a public access point on the NE shore, there is no parking on the roadway within walking distance. You can, get in about half way down the lake (green arrow above, enter 17 Lakeview Avenue, Carvel, AB into your nav). You might snag one of the two parking spots or you can park on the side of the road.
The lake requires a 250m carry (blue arrow) along some ATV paths. It isn't a long carry but there are some challenges. There is a small valley and ridge right away.
Then at the top, there is a long, steep slope down to the lake. The picture below shows the first half of the descent, looking south towards the lake. Then the path turns east.
The picture below shows the second half of the descent looking north (from the bottom). It is steep and rutted, there are rocks and roots, and also slippery leaves. You'll want to wear good shoes.
At the bottom, there is a little dock (green arrow) that had been pulled for the season in the photo below. Entry was so-so.
The lake was nice. Small, mostly pretty clean, and empty on a Wednesday evening in October.
I did two laps in an hour and a bit and there was some lovely colour.
The Allen Beach resort is shown below.
The sun started to drop towards the cloud bank so I called it and headed back.
The climb back up with the boat on my head was tough. I made it in one go but was huffing a bit and my back was a touch sore the next day. Mostly the footing was just tricky and, of course, my arms were busy with the boat. This would likely be less challenging with two people carrying two boats.