You can use them, but it will be a bit limited.
There are a few types of forks -
1. Ones that attach to your bucket with thumbscrews
2. Ones that attach to your bucket with small binders
3. Ones that attach with both of the above.
Before I changed to my current tractor, on which I disconnect my bucket and attach a quick tach set of forks, I had a TC33 and I had the third type I mentioned. I like them because the thumb screws are perfect for light duty stuff like brush, whereas I could add the binders for heavier loads. Small loads of firewoods and pellets will be within your capacity, but don't expect to be lifting a whole lot more.
The problem with forks that go on the bucket is that the load is in front of the bucket, which greatly reduces the rated lift capacity of the FEL. However, for what you want to do, it should work ok.
Go to ebay and do a search for "tractor pallet". Alot of options will come up - most with free shipping and fairly reasonbly priced