I say go for it as well. As with any vehicle make sure it is mechanically sound prior to leaving on the trip. I took a 1985 Toyota XCab 4x4 Pickup on a 2500 mile trip from Phoenix, AZ to Guatemala 4 months after making the purchase and it made the trip just fine. I would not hesitate to do it again given a mechanically sound vehicle and the time. Also, don't worry about spare parts as these are readily available in most any area.
Kevin
1989 Suburban
All Stock (for now)
1995 Toyota T-100 XCab 4x4
Fiberglass shell with 12 volt outlet
Powertrax No Slip Locker
2" lift via Ball JUNK Spacers (Soon to be replaced by OME Torsion Bars) and Add a Leaf
Rancho RS5000 shocks
Sure Power Dual Battery System
HF Multi mount Winch