I have a touring-type bike with eyelets for a rear and front rack/packs. I want to do some light touring (something above the 'credit card' level) in Europe and South America. Because of dirt roads I might encounter, I need to carry an extra set of 'cross' type tires for the hard-packed dirt. I'll also be away from center centers at times, so I'll need to carry extra provisions, tools, etc. than the usual credit card overnighter. I would like to go with rear panniers only but does anyone out there have experience with front vs. rear panniers and issues with bike handling? And recommendations on a rear rack that combines lightweight with strength (I know - a tough combo); price isn't too much of an issue since the bike is my vehicle most of the time. And finally, any good recommendations on compact rear panniers (or front) that, I assume, would need to be waterproof? Thanks in advance for any suggestions or recommendations.