Hey Nomad,
Here are my answers to your questions:
1. Is there a group leader?
A) For conversations that require some fine words, Ewyn is up for the task. My concern about a "group leader" though is that some of us get bogged down with real life from time to time... I'd hate for that to be the "group leader" and suddenly the game is stalled. Can you do something similar to what you just did here in the Q/A and we agree to go with what the majority of players who posted a response decided? If it's a tie vote, the DM rolls the dice and whatever it lands on is the direction we go?
I just know that forum-based games are notoriously slow, especially when some players get bogged down (myself included). That's my suggestion.
2. What is your marching order. Do you typically march two abreast? I'd also like a single file order as well since much of the time in woods that will likely be the reality of your movement.
A) Here are my suggestions for two abreast and single file order:
TWO ABREAST
Front: Silver, Steel
Second Row: Soledad, Thaoran
Third Row: Hornet
Fourth Row: Dok, Ewyn
SINGLE FILE
Silver, Steel, Thaoran, Soledad, Hornet, Ewyn Dok
The rationale is this: Silver has the highest preception so she needs to be at the front. Steel and she are already established as friends/partners, and both of them are primarily melee fighters. Dok and I at the back because the two of us can also fight well enough in melee. My understanding is that Thaoran and Soledad both want to be using ranged weapons primarily, and Hornet is definitely good with a crossbow.
I'm not married to this idea... so, it y'all want something different, Ewyn's good anywhere.
3. If you spend much time outside, what is your plan for camp? I don't need great detail, but some groups light a campfire while others decide that their characters will always rough-it and go without. The order of guard duty would be good to know as well.
A) Ewyn is good to take a watch at any time but would prefer first watch. He would be in favour of campfires normally, but if it seems like it's going to draw unwanted attention, he's fine to go without... for instance, if it seems like it might alert the goblins that we're on their trail, he'd go without.
4. If there is any other "standard operating procedure" that I should know now is the time to speak up. For example, in the last table-top campaign I was in my warlock always opened every door or chest using mage hand. We never just went up to a door and opened it.
A) Ewyn will cast Guidance whenever he has the opportunity (for instance, he would have been casting it on people's perception (or investigation) as we were searching for those tracks. Definitely on himself if there's time.
If the number of enemies we face is equal to or more than 7, Ewyn would likely try to throw up Hex and then shift to either Eldritch Blast (if there is still some distance between Ewyn and the enemy) or Booming Blade with the Warhammer (if engaged in melee). He'll also put up Hexblade's Curse the first time he gets damaged.
Ewyn is always for taking a short rest.
Hope that helps.