Okay, based on what I own, I just put together two 300 point armies.
Republic
9 Clone Troopers
1 ARC trooper
5 Kashyyyk troopers [Heavy Weapons]
5 Utapau Toopers [Snipers]
5 Saleucami Troopers
2 Arial Clone Trooper Commanders
300 points exactly
Sepratists
14 Battle Droids
2 Security Battle Droids
9 Super Battle Droids
3 Destroyer Droids
2 Battle Droid Officers
2 Spider Droids
300 points exactly
I am going to try out the Endor map first and pretend it is Kashyyyk. One change I might make before game time is to replace the Saleucami Troopers and 1 Utapau Trooper with 2 AT-RT walkers. I might also replace 2 more Utapau Troopers with 2 Wookie Scouts. However, I have to admit that the army of 27 clones looks really cool.
I plan on using the "Concealment" special rules for this scenario, found in the "Attack on Endor" scenario book. [Concealment - The green tinted areas represent dense foliage. Character have difficulty seeing through the mass of leaves and small trees, but it does not provide cover. These areas are considered Difficult Terrain. When making a non-melee attack into, out of, or through tinted areas, roll two D20s and take the lower result. Concealment does not apply to abilities that require a save, such as grenades.] Are unites with Mounted Weapon affected by difficult terrain? If so, I might make a house rule to say otherwise... or at least for the concealment rules for this map. The walkers should just trample through the terrain unaffected. I know the Arial Clones have flight, so they are fine. I might also make a special rule that allows the Utapau troopers to climb a tree and snip from it. Maybe have it cost a move order and it can enter the "wall" section of the tree. Then it can shoot from cover/concealment. They do have "Wall Climber" after all, and they are snipers.
I think I am going to first set it up as a Separatist attack on a Republic installation. Then we will probably play on the other "Attack on Endor" map of the ruin base, and this time reverse the roles. If you are interested, I will try to get pictures and maybe post them here, or in the "Battle Reports" sub forum.
EDIT: