forumite Wooly has a Gorilla Monsoon that is pretty sweet:
https://forums.thepaceline.net/showthread.php?t=233101
They might be able to give some impressions, but it sounds like what you're describing to do with the bike is what this bike was designed to do. I guess just check about your trailer and how that attaches with through-axles?
I think for overall rideability I'd pick the GM over the LHT. The geometry would be the primary selection for me in terms of fit and the slight nuance (or placebo) of a more modern steel tubing set would be my second factor. But I currently have neither bike and only had a LHT for a short time a while back.