I wonder if you might be better off with a bike made for loaded touring like an ECR.
DT Swiss's "Hybrid" line of wheels is, in spite of its name, for e-bikes. They have strengthened versions of the hubs with thicker shells and steel freehubs as well as stronger spokes. The 1700 wheelset has 350 hub,s 28-spoke wheels and 30mm rims that are a little skinny for plus tires (2.8 or 3 in), but would be fine with 2.4-2.6 tires. The more premium 1501 version has triple butted spokes and 240 hubs. I've been following this stuff because E-MTB stuff has found favor for MTB tandem use; MTBTandems makes plus wheels based on the 36 spoke high flange version of the 350 hybrid hub.
On the other hand availability of anything this year might be difficult.
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Genesis 49:16-17
Last edited by Darth Lefty; 02-01-21 at 12:30 PM.