Brown Mountain/ Linville sounds like the perfect ride and family trip.
For the FZJ 80 guys on here, this head gasket issue has consumed me with fear. I would love to make trips like this, but I feel I need to do this as PM before I get out somewhere and can't make it back, especially with 3 kids (one of them 3 weeks old) and a dog. I will most likely sideline for a little while until I get this done.
You should try to make the trip or at least the meeting on Saturday. Like the guys have mentioned, HG's aren't
that common of a failure to lose sleep over. I don't know what your experience is with Toyota 4x4s, but they are designed to handle tough conditions in the roughest parts of the world. Yeah stuff can break and fail on anything, but unless you are showing signs of HG issues (bubbles in the coolant overflow, coolant in the oil, oil in the coolant, etc.) you should be fine.
Having said that I would recommend a good baseline of any truck after buying it. Before a road trip with it, I'd drain and fill all the fluids and give the truck a good once over (check wheel bearings, tie rod ends, brakes, heater hoses, etc.).
If you're still concerned about the HG, the other thing I would recommend is a ScanGauge (
ScanGaugeII). You can use it to closely watch your water temperature (much more accurate than the dash gage), plus it monitors other engine info, scans codes, and calculates fuel mileage.
One of the big benefits of the club is getting help from other members. If something happens on the road (water pump fails), on a trail (stuck in mud up to your headlights), or whatever, there are plenty of other folks to pitch in and help. We've got a good group of 80s, 100s, pickups, trailers, etc. to help get someone going again or even towed back home for repair. Not that we want to do maintenace on the trips (that's what HAMOM's are for), but if something unexpected happens we can help...