I'm sorry if this is a common question and annoying, but I don't know bicycles anymore, because it's been years since I was really "into it" and now there are all sorts of new-fangled things like disc brakes and LED lights, and probably new types of bikes too.
Anyway, back in '93 or so I bought a Giant Nutra cross bike, 700C wheels, 21-speed Shimano, cro-moly frame, no suspension. I love that bike; put around 4,000 miles on it over the next couple years, on and off road but mostly just "around", then got to Texas and quit riding except once in a blue moon. Just got back from a 2-month trip to Australia and Thailand, and decided to go ahead and start scheming for the next one (which will be limited by real life, i.e. 2-weeks' vacation time annually), and have been eyeing my old bicycle and would like to take it with me after I do a rebuild and get in shape again; I'd like to see a bit of the world on my bike next time.
Long story short, $300 cross bike (maybe $500 with upgrades like suspension seatpost, aluminum handlebars, accessories, etc), perfect condition sans scrapes here and there, sufficient for a couple weeks of pedalling through, say, Austria and Hungary? With around ... 35 lbs of stuff max over the rear wheel? Or is this out of a cross bike's league? I personally think it would laugh at such a trip given the mileage I've put on it without problems in the past, but wanted to see what you who've done this before think before I start working on it to this goal, since I've never ridden it past 60 miles or so in any given trip, nor carried much more than myself.
TIA