As for inside the tent, well, that's a good point. I'm not clear about any particular solution here, although part of me says you will NEVER be so sound asleep as to roll over on that little child. I don't think any kind of folding crib is the solution, either; it wouldn't be practical to carry, plus might be cold standing upright in a chilly tent. Could the baby sleep in the child carrier? Maybe you could try that some night at home, before the trip, though don't quote me on this as I'm hardly convinced it'd be the most comfortable way for your baby to spend a night.
That said, my advice is: Take a summer off. You'll be plenty busy raising a baby without adding the complication of a backpacking trip. Settle for some day trips; summer of 2005 is soon enough to be doing overnighters again.