Usually I run Stevescarts tree farms to fuel my boilers, either through converting saplings into biofuel or cutting up jungle trees into planks. The biofuel boilers work well but need a whole system just to make mulch if you want to make it "no touch". The plank system works well too, but I hate all the Redpower systems spamming of 50 extra stacks just to satisfy a need of 1.
OR? Why not AND? I am currently running a Steve's Carts Tree Farm that fuels two HP boilers fueled with biofuel and one HP boiler fueled with planks, and I am just waiting for a massive backlog of planks before starting up another HP boiler to run off both charcoal (from sawdust) and planks.
As to making it "no touch"... My current system does require two inputs, Apatite and Cobble. The Cobble is turned into sand for my Peat Farm while the Apatite is used to make fertilizer. Basically all I did was add a Peat Farm and 8 peat-fired engines to the system. These produce extra MJ for me, but more importantly they make ash, which I combine with Apatite to make fertilizer. I then run one Fermenter entirely off Apples (Mulch and Juice) and two others off of fertilizer and water. The peat farm makes the system use a lot more space, but it is also super-simple to set up and run so it is well worth it. As to getting the Apatite and Sand into the system, that is fairly easy. My "Power Plant" is running on it's own independent AE system. So I have my main AE system keep a chest filled with Apatite and another chest filled with Cobble. I have the Power Plant system attached to those two chests as if they are part of its inventory, so it pulls directly from them as needed, and the main AE system immediately refills them if Cobble or Apatite are available (which they always seem to be). So this effectively makes it no-touch as long as my main system is in use, and thanks to the Mulch/apple thing even if my main system is unused for a long time the power plant will keep running for a very long time (Especially with my 12,000,000mb Xycraft tank of biofuel as a buffer).
Related to the above, I also output all gravel and flint (which are unnecessary output of my Power Plant) to the main system through another chest (a double to give me more room to add connections), and any standard saplings or apples I put in my main system are transferred to the Power Plant through that same chest. This works well and is easy to set up because of how AE import and export connections are easily and independently configurable. Another option this provides me, if I ever decide to use it, is the ability to import Sand directly to the power plant by just adding an extra export connection to the chest and a level emitter to only import sand when my main system is above a defined "on hand" amount.
Also, USE AE. Once you are little way into the game and have enough quartz on hand it really helps make this kind of system work efficiently.