Hi astrodd,

I have a similar situation. My observing location is right down the bottom of the garden in a fenced off pool area with metal fencing all around. I have a pretty powerful router in the house but have found the best connection has been using a Netgear EXT6200 extender. This is dual band. It has the advantage of being able to be powered by a 12 v dc supply rather than needing a power plug like many extenders on the market.
I connect to the Netgear using the 5GHz band from the Pi (Static IP). Then the Netgear connects to the house network via 2.4GHz. I have used ethernet from the Pi to the Netgear but I have not found this to be better. Less cables the better. I then connect to the Pi headless via Real VNC (I use Astroberry).
I use this extender in the field too (peer to peer) as it gives enough range to image from a club house or car using a laptop if very cold.

Hope this helps.

Mke

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