I know there are Scottish influences in the music, but the presence of bagpipes isn't necessarily one of them. A LOT of countries had versions of the bagpipes (tracing back to the middle east). Ever heard of Nordic bagpipes (more commonly known as Swedish bagpipes, or sakpipa? And from what I can tell, a lot of "Scandinavian" styles were present in the music. Also, vikings were present in Scotland... so its fitting enough. The Scottish marching style at the very end of "Coming Back Around" may be a little out of place however, haha