I'm down here SE of Seattle in the foothills. How many hives are you working ? Are your hives 8 or 10 frame ? I'm just trying to get an idea what issues you are facing with heavy brood box(s) n supers. Do you have health or back issues. I am aware of how heavy hives full of honey n brood can be.
. Here is my apiary n one 10 double deep hive is hidden behind my barn workshop.
I'm just about to turn 71 yrs so understand being careful n moving these heavy boxes. I try to have my hives raised about 18" off the ground. Also when lifting n removing full boxes I try to have someplace off the ground 18" or so to set the heavy beasts. Really don't want to screwup at my age. I find keeping boxes higher as I break a hive down limits issues of messing up my back. I've always been around having to lift heavy stuff so try to keep my back straight n lifted with my legs. That will really save your back.
I'm slowly in the progress of using lighter cedar boxes. Also I've with my first Flow-hive I've started working toward a lighter hive with 8 frames instead of the normal 10.
I use shallow honey supers because they are much lighter n easier on my back on
my several 10 frame conventional Langstroth ...
Not sure if any of this info helps. But until
you figure out a lifting device be careful n lift safely n enjoy your bees.
Take care up there near Baker.
Gerald east of Renton
Sorry about the puzzle. It slipped in when I downloaded the pix's.