seed IC2BTW296RP2V1BC221
main mods installed IC2, BTW296, RP2V2, BC221, Portal Gun Mod, Backpack, Crystal Wings, Death Chest, Wireless Redstone, EE, Motomas Sounds, Slime Boots, Buried Treasure, Treecapitator, addedpipesBC221 mod, Mo Creatures and Walled Cities
I've created this a few times and spawn in the same spot. An island with three regular trees and a pumpkin. You would have to swim/boat to a distant island to find rubber trees, add more challenge with Mo Creatures.
Under this island is an awesome abandoned rail system with plenty of ores and enemies, saw a bunch of skeletons in a parallel mineshaft shoot it out with each other and were unable to shoot me b/c of a pillar.
Enjoy!