What I do if I'm doing BIAB outside is position the BK on the ground, at the edge of a table, and pull it out by hand then clamp it to the edge of the table, suspended above the BK, to let it drain.
1. I use my aluminum folding ladder. I open it up to one of the top steps is above my kettle, then loop the bag tie over the step, pull it up, and tie it off on a lower step. Not pretty but it works.
2. I keep trying to get my wench to do my heavy lifting on brew day, but she does not see the humor in a statement like that...
This is my 47th brew. My 2nd BIAB experience.
Just thought I'd chime in here since I took pretty good notes.
My grain bill was 493.3 pp.
Preboil gravity was 1.053 (@60F).
Lauter volume was 7.25g @ 212F = 6.92G @ 60F
Pre boil potential points: 368.88
Lauter Efficiency: 368.88 / 493.3 = 74.78%
My actual grain absorption-
13.27 lbs grain absorbed 1.04 gal (@60F) = 0.078 gal/lb = 0.313 qt/lb
PS-
I don't know what my LHBS's grain mill is set for, but I ran it thru twice, trying to achieve more of a "fine grind".
I have an eye hook embedded in my garage frame and a rope cleat next to that for suspending the bag over the kettle. I let it drain until I reach boil. Then I take measurements and start my boil timer.