@Brian Kloppenborg The buffer bloat information that you advised about has helped the situation here. I am learning all about practical local networks and finding out that wifi is not as robust as it used to be here. Also got rid of the wifi mice and went back to USB. That seems to have cut the 2.4 GHz interference. Most of the intermittent vague problems with VPHOT have gone away. I have a new router and a switch so I can hardwire the four observatory computers. I still use an old ICRON USB 2.0 Ranger 2304 to talk to the main telescope via USB over CAT5 cable. But the wide FOV scope runs RDP over wifi for now until I get it hardwired to the switch.
Nice looking set up. I observe portable, too many trees at home!
I have always used USB cables to connect my observing laptop when in the field; one to the CEM40-EC and one to a 12V industrial powered USB Hub. Both USB cables have USB booster sections. WiFi was avoid early on as when at public out-reach events the 2.4-GHz–WiFi of telescopes, phones, tablets, etc. was problematic… mostly in dropped frames from the guiding camera. Nothing like a wire wave-guide for communication I always say (or type)!
Jim (DEY)
Good advice Jim
Also, at a starparty, the 2.4 GHz sources will be moving around and their effect varying by 1/d^2 
I’m glad to hear that things are improving!