If you know what type and size of bike you are looking for, Touring or Hybrid depending on your personal comfort, with the appropriate racks. Then you put the word out at the various local bike clubs. Stuff happens, and it is usually good. I received my brand new BOB-original packaging etc. from a friend of a friend including shipping,$160, everyone happy. Tonight on a ride with a couple of bike club members, one had a brand new Rodriguez touring bike. She GAVE me her older (but still great) Trek 531, fully equiped and in great shape I know at least two people who could use it. Now I've been across the US and have ridden Alaska on my Marin Sausolito. I have ridden with Panniers and a BOB. It is all good. People like to help out others.
Camping gear. Buy a light (under 5lbs) two man tent, good quality, with rain fly. You will find a footprint for it, in the form of a light weight tarp maye on the road. You will appreciate the room. My headlight is also my camplight. i bought a whisperlight stove at a garage sale. Tour specific clothes aren't that big a deal, except for raingear and warm layers. Bring some light nylon rope. It is useful, particularly in bear country or where "critters" might get into your stuff.Thermarest self inflating pad is great. I get by with a knife (sharp) fork and a spoon. Maybe a stirring spoon too! I really like the Shimano bike sandals for riding. I have a pair of Sealskin socks that I can put on in cold or inclement weather. The sandals are very comfortable and you can wear them into the shower (or town) and not worry about picking up any nasty's. Then if you feel the need for another pair of shoes, you have more choices- cheap tennies or whatever. Pack a Kevlar spoke in your repair kit. Cheap insurance. If I did one thing consistantly, it was to buy breakfast. It is the cheapest meal of the day, filling, and you meet the nicest people. You then have at least one hot, usually delicious meal under your belt no matter what else happens.