I am going to wait in the shadows until the large patrol is clear, then when I have a clear shot and the group is ready I am going to try and attack whatever kobold is furthest away from the group attacking the door. Or the kobold that has the least enemies looking at it.  Stealth: 12

I have some thrown weapons I can use as well, pick them off while they have to move to us.  We can use the trees for partial cover.  

 As it looks like everyone's ready I find a nice shadowy spot with a clear shot of the back door Stealth 20  and with disadvantage shoot at the closest enemy Attack: 6 Damage: 9 + Sneak attack as they don't know we are here 5

Not sure if I wound have advantage as they don't know we are here yet. If so would the disadvantage from the  smoke and my advantage  cancel each other out? If so should I make a nother attack roll keeping the the damage or reroll the damage also?

(Yah, you'd have disadvantage from them being heavily obscured and advantaged because they don't know you're there, so they'd cancel each other out.  Standard from what I've seen is to just take the first roll if you roll with advantage or disadvantage when you aren't supposed to instead of rolling again..  In this case, unfortunately, that's the 1...I'll update with what happens from your and deekin's attacks when I have some more time)

Quote from VanderLegion >>

(Yah, you'd have disadvantage from them being heavily obscured and advantaged because they don't know you're there, so they'd cancel each other out.  Standard from what I've seen is to just take the first roll if you roll with advantage or disadvantage when you aren't supposed to instead of rolling again..  In this case, unfortunately, that's the 1...I'll update with what happens from your and deekin's attacks when I have some more time)

(On mobile I don't know of a way to do so.  On a computer you can mouse over the roll and it shows the breakdown, both rolls, which was picked, which was discared, etc))

next time make sure you mention that you wait for the patrol to leave before you attack the ones at the rear door.  We need to be careful in here.  Deekins had said he would wait for them to leave,  can we assume dawn did as well?

(Deekin give me an attack/damage roll for your attack since you were the first to say you were going to attack)

(I just assumed they would be gone before I attacked as that was the plan as Deekin put it.)

Deekin waits for the nods of confirmation from his party before making his attack.

Initiative: 16

Attack: 25

Damage: 6

My intention was to wait until the patrol has cleared and then take out the most obscure enemies so we can keep the element of surprise for as long as possible. Is sneak attack automatic in 5thE or is it a skill that only rogues can use?

Sneak attack is rogue only, but you could multi class some level down the road if you wanted it

("Lilu Dallas Multipass")

Deekin waits for the patrol to get round the opposite side of the building and away, then launches a bullet, dropping one of the kobolds at the back door.  At the same time, Dawn launches an arrow, which doesn't even make it into the smoke.  The kobolds in the smoke start shouting about being under attack.

(Everyone else can have a surprise round as well.  You're currently in the trees, about 20 feet away from the low wall, then the door is about 30 feet from the wall, so 20-25 feet from the wall to get to the enemies.  Then roll initiative.  Raiders initiative: 11)

Dawn's initiative 11

Initiative: 25

Pops uses Minor Illusion to cause a swirl of leaves to surround Dawn for her next round. Dolomite Jones will Help Rockcrusher with his next attack. 

Quote from Keneux >>

Initiative: 12

Pops uses Minor Illusion to cause a swirl of leaves to surround Dawn for her next round. Dolomite Jones will Help Rockcrusher with his next attack. 

Maythus Initiative: 19

(You get a surprise round too)