If you've got 'over-packing' under control, and you have the necessary repair items as well as a 1st aid kit, go for it.
As you say, you're only going for a couple of days or so and you will learn what suits you best. As 'boomhauer' mentions,
low gears, but if you have to walk up steep grades, proper shoes are critical as it can be really hard on your ankles and
calves when pushing a loaded bike. I found a pair of clip-ons that were also designed for walking that worked well.