I gave up on 'remembering' the blues scale(s)
Blues (in essence) consists of one type of chord, the dominant 7th. That gives you four notes; root, Major 3rd, perfect 5th and flat 7th.
In a blues bassline or solo you can happily play all these plus;
* scales tones from the parent scale, mixolydian, so 2nd, 4th, Maj6th
* blue notes, minor 3rd, flat 5th and Maj 7th
* the minor 6th, which sounds great as a passing tone in jazz blues
So, that's everything except the flat 2nd (which you would probably find in a minor blues over the V chord anyway)
Thing is, this is all subject to taste. I'd suggest you play along with a load of blues tunes and see how you can use these different notes in context. Try them out, see which work as target notes - i.e. notes you play on beat one, the most important notes.. and which work as passing, chromatic, auxilliary notes.. i.e. notes you use to reach to a target note.
I really dont think learning the blues scale is actually that important as a 'frame of reference' since it is not the specific parent scale for any chord. In my experience it is often taught and used as a 'shape' for solo ideas, but in essence it is just collection of notes, so it doesn't matter if that collection of notes has a name or not. IMO, by playing, improvising, experimenting with ALL 12 notes over the blues, you will eventually build your own frame of reference, or 'collection of notes' to play the blues with.
Learn the chord tones for the dominant 7 chord and use any other notes that sound good around that basic harmony.
Memorising scales wont teach what you sounds good, only playing and using your ears will do that, so experiment
