So I am at the part where Odahviing takes you to Skuldafn. I am about to become over encumbered and need to get back home to store my stuff. Can I do that then come back by calling him and asking for a ride back?
no you cannot call odaving back , if i were you i would drop all of your least important things such as soul gems , maybe you even have a few dragonbones or dragon scales which you will not need , but if all of your stuff is important to you then you should carry on . there might be some perks so when you level up you can carry more . thats all i can tell you.