Using my Specialized Ruby for touring?

[Crankin]

My DH has the large Carradice bag, as well as a medium sized one. We don't tour with our carbon road bikes, but he has used the large one while we were on supported tours and wanted to stop and buy stuff; also for bringing stuff from the farmer's market. It attaches with a special clamp to the seat post. I know that this is a no-no to most people, but it has never caused a problem. We have very light Kuotas; DH's bike is 52 cm and the large bag fits well.
Me, on the other hand, can barely find a tiny bag that will fit on my tiny bike.

[Cataboo]

I almost always bike with my deuter exp race whatever its called and generally it weighs a ton cause I have a spare everything and 3 liters of water (I don't put water bottles on the frame usually)... and I tend to bike by this farm stand and start shoving butternut squashes and things in it... and yeah, I ride with it for hours, I'm used to it and doesn't bother me.

But... if you did the aluminum seatpost + seatpost mounted rear rack... You can bungee your sleeping pad/sleeping bag/tent for probably less than 10 lbs of weight. Stash the sleeping bag and tent in a drybag. Depending on the season, a down vest and maybe down booties you can squeeze little are handy for around camp. But sounds like you do enough lightweight backpacking that you probably don't need hints on what to pack.

If you want a lighter stove, you can do a pepsi can stove. The rest of whatever you need in a backpack.

If you need a little bit more storage, you could put a handlebar bag on the front if you don't have carbon handlebars (you probably could put one on with carbon handlebars, just don't put too much weight in them.)

costco sells some light solar rechargeable flashlights, 2 for $20 that I think are great. I keep 'em strapped to my kayak deck when kayak touring, or just in the outer mesh pocket of my backpack when backpacking or biking. More than enough light for at night when combined with a headlamp in case you need more light.

[Eden]

You might be able to rent a trailer. As long as it is a skewer mount type you could pull one with your Ruby without risk of damaging it.

[moderncyclista]

Do not mount a rack to a Ruby. Trailer is your best option in the short term. In the long term, you may want to consider buying a quality road worthy touring bike. Many excellent choices abound. (Trek 520, Jamis Aurora and Aurora Elite, Surly LHT, Cannondale Touring, Rivendell Atlantis, etc, etc) I've heard of people touring with road bikes, but I wouldn't. There is no bike that uniformly works for "every type of riding." Each have their strengths and weaknesses. Touring bikes have wider tires, lower gear ratios, longer chainstays (to prevent heel strike), usually steel frames (can be aluminum ie. Cannondale Touring1&2.) *Touring bikes don't roll as fast as road bikes but a leisurely pace is best to prevent fatigue and maintain stamina.* I would not want a road bike tire width if I had to cross a suspension bridge. Eeep. Also, road bike rims aren't made for hauling. Increased spoke count on Touring bikes decreases wheel stress.

Short answer: Each bike has its purpose. I wouldn't use a Ruby as bad a$$ as they are. I would save up for a touring bike. Keep the Ruby too, they each have their merits.