Go with the smaller chainring combo for the reasons motobecane69 mentioned. And consider a 9 cog cassette for the smaller jumps.

Here's a link to Sheldon's Gear Calculator. Great tool, especially when set to calculate mph at a given spin rate. I've found the 22/34 combo to be iffy for long, steep climbs simply because I can't spin fast enough long enough to keep the bike moving in a straight line. You probably can.