I live in the PNW as well and also have reynauds syndrome. The small blood vessels in my fingers and toes often contract in temps lower than 50 so I know a lot about freezing extremities!
I bought battery powered, heated gloves for off-horse work around the farm or getting ready to ride. They were about $170 and I use those for very cold temps or bad reynauds flare-ups when my body cannot regulate circulation.
On a regular basis I layer thin nitrile-dipped garden/work gloves with disposable nitrile gloves over top. It helps keep my skin from making contact with any moisture. I prefer the orange textured nitrile gloves from Gloveworks. They are marketed towards mechanics and are thicker and have great grip.
I have MANY pairs of neoprene-palm garden gloves that I switch out as soon as they get damp. I ride in the gardening/work gloves in winter more than real riding gloves. You can get thin or fleece lined. The nitrile palms still allow me to have good feel of the horse’s mouth while offering some protection against moisture. The key is to keep them dry and switch them out as soon as they are a teeny bit damp from sweat or environmental moisture. The key here in PNW is not just warmth but giving yourself a barrier from the ever-present winter wet.
Unfortunately, you probably need bigger boots for winter. Both pairs of my winter boots are a size larger than my 3 season boots. Some of the extra room is for thicker socks, but mainly the extra room is to prevent constriction. My barn work winter boots are the thicker neoprene insulated Bogs (I don’t remember the style name because they’ve changed but I think they are rated for -40 degrees) and my winter riding boots are Ariat Conistan Pro Vortex boot. Keep extra socks handy and switch them out at the first feeling of cold, wet toes.
About the foot heat packs- open them and set them out for 10 minutes before putting them in the boot. They won’t activate well straight from the package and into the shoe.