5 Druids can be alot of fun. I can clear all heroics but like was mentioned the shamans are easier. My druids dual spec so when im running dailies or PVP i have an easier time. My first spec is the tank/healer/3 DPS and my secondary spec is 5 feral kitties.

I used to have alot of fun using them as 5 boomkins but i mostly felt like underpowered shaman or locks depending how i played them. DoTing up people and running was pretty effective since its harder to "stand your ground" with the druids.

As for bear tanking when im running through trash i mostly use this:

#showtooltip
/cast Swipe (Bear)(Rank 8)
/cast Maul
/startattack

It works just fine for me for most trash since i get a few swipes off while the boomkins apply insect swarm and moonfire dots.

for bosses i use something like this:

#showtooltip
/castsequence reset=combat Mangle (Bear)(Rank 5), Lacerate, Lacerate, Lacerate
/cast Maul
/startattack

You can switch lacerate for swipe if the boss has adds. I manually use FFF (feral faerie fire) for pulling at the start of the fight. Using those macros its pretty simple to manage the tank and dps, my healer has seperate macros/keybinds to heal each party member or the tank but i find i use wild growth alot. Yes it costs more mana but my healer never goes under 80% mana except on rare fights that take too long like paletress with all the party dmg taken.

As for eclipse procs i just use a cast sequence with 3 wraths and then 3 starfires. Its not the most optimal dps but i couldnt be bothered with manually using seperate dps keys since you never get all 3 boomkins with same proc up at the same time or atleast not very often.

If you dont like it you can always go with tank/healer/3 kitties. I find this alot of fun lately when im not leveling my new ret pallies up and its a great change of pace with its own unique challenges.