We are doing History Odyssey Level 1 Ancients with my 3rd and 4th graders and Level 2 Ancients with my 5th grader. It is pretty much all laid out for me. You do have some supplemental reading and activities to choose from in Level 1 but it's not as overwhelming to me as the SOTW activity guides were. It's usually a choice between 3 - 4 activities and it's not even every week. So far the supplemental reading has been limited by what I can find at the library. I've only been able to find 1 - 2 of the 6 - 10 titles mentioned at the libraries in the two counties closest to me.
The level 2 is completely laid out, no optional activities. My oldest son is behind in his writing skills but I still find the amount of writing required doable. He does complain a little about the writing but overall he enjoys it. I like how it starts with "Write a sentence about ....." and gradually increases the difficulty of the writing required. That's just the kind of hand holding I needed and the kind of slowly rising expectations ds needed. The Kingfisher History is a bit dry but so far the most he has been asked to read is a 2 page spread, most of which was pictures.
You can try 12 weeks of any of the HO titles before you buy. That was excellent for me so I could spread my curriculum purchases out a little bit. Plus, since we are already using it and like it, I know it won't be a wasted purchase. ;)