Being a designer of mechanical equipment & conveyor systems, I know that you can carry practically anything on a conveyor of some sort (conveying equip. includes bucket elevators, screw conveyors, feeders, etc). I have designed systems to carry coal, wood chips, logs, bark, -8" granite rip-rap, cotton seed, soybeans, Bauxite, Alumina, scrap metal, Saint Peter sandstone,chemical products and so forth. Belts are ok for almost anything. You can actually buy belting that has a herringbone ribbed surface to grip materials. Used is the way to go if you can locate it. Belts are more limited in the incline they will carry material up than is a chain conveyor with flights.
On a frosty morning I have seen smudge pots placed near to the feed point on a belt so that the belt would warm up and grip the wood being carried. This was required since the belt incline was pretty steep - 30degrees or so to horiz. Before the belt was heated up bulk wood chips (this was at a chip mill) would just sit there with the belt (a herringbone ribbed surface) with the belt running under them! A belt running in a formed trough or pan will not necessarily be guided by the sides of the pan. If the tail - or head - is out of parallel then the belt will run right up the side of the pan.
A chain conveyor with flights and running in a formed steel trough will convey practically any material up a very steep incline. I did one that carried up to 250tph of 8 ft. pulp wood into the infeed hopper of a debarking drum. I like chains for a variety of reasons, not the least of which is no training is required. A belt conveyor must be trained to run straight or it will be constantly running to one side or the other.
Used conveyor chain, gearboxes etc. are not that hard to find. Check out the stuff (new and used) at......... - I guess no link references are made here! - Forgot - be glad to give it in a pm if thats ok.
This is a 6ft. wide belt carrying scrimmed wood
This chain conveyor with cradles carries 9ft. lengths of pine logs.
These chains with welded on lugs or flights carry wood up a 30- degree incline. I designed all of the above items that are now in service at Meridian, Mississippi. I have done conveyors that are inclined up to 40 degrees carring both logs, chips/bark.
An inclined log deck with flighted chain carriers
Chain conveyors need only be sprocketed at the head (assuming that this is the drive end). The tail spool can even be stationary and not have to rotate (commonly called an Oregon wrap). This saves bearings and shafts.
An 'S' wrap drive can be made underneath the conveyor on the return chain run but requires additional shafts, bearings. Advantage of an 'S' wrap conveyor (can be done with belt also) is that it gets the drive away from the discharge end and closer to grade where it will be easier to maintain. An 'S' wrap conveyor can have a pipe spool head (rotating & w/shaft,bearings) a fixed or rotating pipe spool tail, a rotating pipe spool bend shaft, and of course the sprocket driven driveshaft.
With a little work you can even use heavy - say 3/8" bar - link chain and make your flights onto the vertical kinks. (1/4" bar links are ok but life is a factor in a relatively heavy duty/high wear situation) You can add teeth to a pipe and make your own sprockets. Be sure and use a grade of shafting that can be welded - alloy shafting does not take kindly to welds and will either break or the features welded on to it will break off. AISI 1018 is a good mild, weldable shafting. I have considered building a short conveyor like this myself.
Chain can be purchased in many configurations. Detachable chain is assembled by hand. Used chain in any size is available. You might even be able to locate some at a nearby sawmill or other forest industry facility - at least they would be able to refer you to a source.
You can build a conveyor to suit your needs without a lot of expertise. If you can weld and run some shop tools you're home free! You might even be able to find a used conveyor that you can adapt and/or repair-modify-refit and build on a transporting trailer. Conveyors are great labor saving devices, and my tired old back needs all the assistance it can get!