Welcome!
I was just up in your neck of the woods 3 weeks ago. To be honest the Fist is not impractical.
I use it for everything and there is barely a time I can think of where the Fist couldn't do the job I asked.
Short list of tasks I've done in the Fist (but not limited to):
-Carrying all my track day stuff. (One extra set of wheels, extra oils, small tool set, small cooler, 5 extra gallons of E85.)
-Moving (mostly boxes, but damn did it fit a lot of boxes!)
-Costco runs (I only have 1 kid though and no baby seat/baby stuff carried)
-etc
Things I couldn't do in the Fist:
-Ikea runs for furniture
-Fitting a 60" TV without the box (not many cars can)