Hmm, you should just be able to find them through exploration.
The logs are found via exploring the forest, eventually you'll find a clearing (should be ~15% chance) and then a "Chop Logs" option should appear.
The iron is found in the caves. After starting the wolf quest, exploring the field should drop you into them. You can also buy iron from Rohan if you've got some extra gold.
If it's still an issue, please let me know. I'd like to make sure it's all functioning properly! ♡