Need 4e Help already!

[SamTheCleric]

So, my local gaming store is doing midnight madness sale... as well as a day long session of gaming on saturday. The 5pm to 7pm game is "build a 5th level character. 7 people at the table at any given time. Roll randomly for encounters... if you die, you're replaced with the next person in line. Last man standing wins"

5th level survivability vs random encounters scares me. I was thinking of an Elf Ranger for the mobility and distance advantage... but maybe you guys have a better idea than me.