I would suggest looking into a woodfired boiler, as it can produce both hot water and steam.
There are firetube and watertube boilers. Watertube boilers generally are more expensive, but require less maintenance.
As for the amount of power you can generate, the coal fired boilers that power much of the world, are run on steam.

There are a few factors that will determine the power output you can achieve.
The ability of your system to handle pressure will determine the speed at which your turbine can spin.
The volume of steam will determine the size of turbine you can drive.

This page has a great example of a simple watertube boiler.

http://www.energyefficiencyasia.org/energyequipment/typesofboiler.html

Solar pv can be made DIY, search youtube, has vids with easy instructions. Copper sheets used. Wire. Used but serviceable batteries cheap..all 12 volt appliances..converter..easier and less complicated than boilers and safer..leave your trees alive..build wall hung..don't go there :)..passive solar heaters,DIY roof top passive solar heater( old mother earth news archived articles or use 500 btu ceramic 12 v heaters with fans for air circulation..32 bucks each approx..try that approach..wind power 250 bucks, drop flume hydro power worth the 1500 bucks for usable voltages, check out earth energies used in 1800 to power or charge batteries..search Stubblefield Transformers and other innovations..Tesla coils are another option I know very little about..seems to be inadequate and still experimental?
Build a methane still, search for plans, cow crap and a little welding and piping, a bell collector, pump for filling propane bottles..run generator, truck off that..wood alchy still..many better ways than burning trees.?? Your trees though.

Every step you take to change one form of energy to another you lose a significant amount in the conversion.
Think only of the time, calories fuel etc that you'd burn just cutting the trees to feed the boiler!
Get a small diesel generator and stockpile fuel if that's how you want to go. For sound dampening you can insulate the shed it's in, then run the exhaust into a metal garbage can that is also insulated with the yellow pipe insulation as well as wrap the exhaust in it. Doing that will make it virtually soundproof from 500m if not less.

Diesel is a finite supply, and for those looking for something more sustainable, as well as low cost once it is running, boilers are great options.
I build and maintain industrial boilers in the pulp and paper, oil and gas, as well as other industries, and the power available and versatility of a boiler is hard to match.
They can be run off of natural gas, diesel, black liquor, coal, bio-fuels, etc... If it burns, a boiler will run.

A small setup can be made reasonably cheaply, and as long as pressure ratings are adhered to, very safely as well.
It has the added benefit vs. a lot of systems to produce heat, hot water, stream for electricity, and can also have a wood gasifier system integrated depending on how complex of a system you wish to create.

Oh I agree with you but in the context that he had first asked about as a back up source of energy, I think the initial cost and time involved to keep it running wouldn't really justify putting in a boiler/steam turbine.
Here's some food for thought.
http://www.backwoodshome.com/articles/goebel43.html

the reason I want to use wood is because I have alot of dead fall and it will rot anyway if not used. Also I am set up for solar but what if the sun does not shine through (ash cover) (fallout) etc

Well no matter what you decide as far as using your deadfalls, I'd suggest cleaning them up and cutting them up, stacking off the ground and have some form of cover over it to allow air flow. A wood shed works about best for that. This way, you'll have it ready for anything whether it's powering you steam generator or heating your shelter. You'll get the most out of your wood when it's well dried either way!