When one is bike camping, you essentially need to pack like a backpacker, and then add other bike support elements. When travelling backcountry and roads, you cannot easily get to supplies as needed. When doing this solo, you can not share the load for tents, cook gear, water filters, spare parts, tools, etc. After some research, there seems to be 3 different ways to carry yer shhtuff.
First, Bike packing route for mountain bikes, which is getting popular and numerous products from multiple vendors are available. This dovetails with the ultralight backpacking advances coupled with a minimalist approach to gear. In essence, strap gear into your frame triangle, top bar, onto handle bars and large under seat bags. Even strapped to side of front forks. However, 2 things work against this for me; solo trip means I need to carry everything needed, and also I am short fellow with a small bike - not alot of extra room.
The second method is the more traditional panniers but with beefed up panniers. A bit more room, but still a challenge for the same reasons above. Also, I am not really a minimalist, I like to be prepared for a variety of adverse situations. Also, it is not a race and would like to have some gear for non biking activities, like hiking and mayhaps fishing.
The 3rd method is a trailer, which is also recommended by the route sponsors. While there are 2 or 3 trailers brands out there, the one that seems universally used is B.O.B. trailers (Beast Of Burden) Yak and Ibex (w/ shock) models. This can carry up to 70lbs!!! Though my target is about 30 lbs.