Here in Pennsylvania, a pair of adult Eagles were rescued a few days ago from a river when they got their talons stuck and fell in. On the news they said the Eagles were "fighting." Well, I guess you could call it that. I prefer "courting." Anyway, a local sheriff fished them out, took them back to his truck to warm up, and let them go. All's good.
I don't like 360 degree brims for birding because they mess up your hearing and it's hard to locate the singing birds with all the funky audible reflections off the brim. At altitude or out in the open full brims are necessary though. Unless you want to burn your ears off.
I often use trekking poles (pretty much de rigueur for old farts like me going backpackacking
), but yup they are too short to use as monopods--and who has time for monopods anyway?
I have a monopod and I used it with a little 27x scope. I didn't like it though. Just give me a little tripod. I'll carry it.
Mark
PS: forgot to mention that, yes, those bills will obstruct your vertical view and cause you to smack your head into low-hanging branches. Routinely in fact. I let my wife take the lead when we go hiking. She says: "Look out, there's a branch." Mostly it works.