Do i go with archery only, or also dual wield(Daggers?), 2H or sword and board for when they get close?
Up to you, really. I like Bow/Greatsword, because when they do Close, you can play with Reach, but honestly, that's a replacer for a Spear, because we don't get those. Dual Wield has the least Defense, because you can't Block, and Shield has the most, because of the Elemental Protection Perk. 2H can Block, badly, but is excellent for Bashing, because it does more damage (Especially with Power/Deadly bash.) Also, using quickbashes, instead of standing there with Block up gives you an opening to strike, or switch weapons, like the Bow Bash, so it's not much of a change in style. The Bow takes up both hands, and you can Bash to make an opening, so does the Greatsword.
However, with a Shield, I'd suggest a Handaxe, and the Hack&Slash Perks. This bleeding damage makes a significant difference on the living (Meaning, not Skeletons, Draugr, and so forth, because they don't Bleed) by stacking up over successive strikes, and you can pair it with the Targe of the Blooded, but this will eventually make you a Light Tank with a Bow, and less of an Archer.
Just the bow is a bit of a challenge only in that if your Strategy (Sneak in for the first shot with a multiplier, and shoot them before they close) falls through, you are basically left weak in the Tactical environment, where you can run, and hope to re-position, or die. This is fine for 1, or two targets you can Evade, or concentrate fire on so at some point its a duel/2-on-1 with a follower, but a Zerg Rush will overwhelm you with shear numbers if you let them surround you.
Typically, in Skyrim, Archers carry a Dagger for close up, which honestly isn't much stronger than the bow. You get fast striking, that's about it. With 2 daggers, and the right perks, you can get fast enough to be all right in a Duel, but in that case, why didn't you just Shoot him? Out numbered, you're wearing Light Armor, and can't block, have very little Stagger chance, so it's a damage race, you against all of them. Not real good odds.
Turtle (With a Shield, you can cover up so you can't attack, for more Protection. Not unlike a Turtle with his head in his shell, sub-variety of Tank) slows you down, so when you switch, you'll be less likely to be able to disengage, relocate, and swap back to the bow when you get an opening. Also, Reach is more of an issue, so you might as well go with an Axe, which is about as much reach as the Shield bash, so you won't just butterfly in front of them. (That's embarrassing, and a waste of Stamina.)
A Greatsword swings slow, but with footwork, timing, well placed bashes, and knowing the moment you can strike without counter it's basically the same kind of fighting style, only with Reach instead of Range. If you don't have room to maneuver, you can at least back into a bottleneck where they can't surround you with more than 2-3 guys, bash one, and hit the other until you even up the fight. You really have the most options here, it's actually fairly light weight for your full Equipped weight (Which determines how much Stamina you use when you Sprint) and from a Damage-per-Hit standpoint actually pretty powerful.