Often it's most important to know where you will be sleeping, and can you dry out gear overnight.
Going for a goat hunt and you will be in a little tent the whole time? You will be wet or dry, depending on conditions. But no place to dry out, so use fleece and gor-tex as it's light.
I tend to use HH lighter stretchy bibs (Impertech?) And a good quality MEC Gor-tex jacket I've had for years. I open up the vents and I stay pretty dry when exerting myself. If I'm not moving much, I put the HH jacket on.
As always, layering is important, and these days I start with Merino wool, then fleece pants, Stanfields wool shirt, fleece jacket then the rain gear. Obviously this is too much if it's not cold, but it's in layers.
Real coastal wet can defeat any gor-tex boot. Boots can be a challenge. Rubber can sometimes be the most practical as long as you can wear a sock that keeps your foot warm and you aren't hiking too hard That said, I've used my green Baffin rubber boots quite a few times in November blacktail hunting when it gets sloppy, and we are always going up and down hills.
I haven't been real impressed with Sitka. If you opt for that, make sure it's real 100% waterPROOF stuff, not water resistant or 90% gear. I've seen a few of their items blow out in minutes.
I guess the biggest thing is to remember that there is no way around it- if the weather is wet, you will get wet. SO stay warm.
