Re: Is it important?
“...(covering the entire 2.4 GHz band” — that’s a bit selfish and pointless
“, plus a couple of 5 GHz channels” — why?
“...One of the routers has a Yagi antenna aimed at the lake.” — what lake? Why?
“There are two or three additional Gb switches. “ - why? What’s the point you’re making?
“Everything is wired up with STP (Cat 5e/6) Gb cables.” — why STP?
“I had to ensure that the IP addresses, “ — well, yes, this is standard stuff
“WiFi channels” — So?
“ and DHCP settings in the multiple routers didn't conflict. “ — why are you using DHCP settings in multiple routers? Have you not understood the point of a LAN?
Finally, why do you use their router anyway? None of what you’ve written makes sense outside the context of someone who just likes to throw their money around at routers.