Personally, I took ayahuasca first. Like the others said, ayahuasca is not like LSD or mushrooms where you can walk around. I find it similar to the immobilization you may find on a high dose of cacti. These plants, specifically cacti and ayahuasca are medicines. If you are walking around "doing normal things" while being healed and when you are supposed to be paying attention to the experience and how your mind reacts with it then there is something wrong.
Ayahuasca can be VERY intense. Taking too much can really be frightening and leave you scared for months if not years. It seems counter intuitive but I find smoking it to be easier on the mind because if I start to feel bad then I know it will only last a few minutes and if I can't remember I smoked it then I will still come down in a few minutes. With the oral dose it can pull and push you out of a state similar but I find it's rougher of a ride, especially if you are fighting it.
Although, ayahuasca can do things that smoking DMT purely can't do, in my opinion. Ayhuasca seems to have the ability to be more spiritual from my opinion. Also, it's slowed down in a sense so you can absorb more from it. Everytime I take an oral dose of a psychedelic, I always come back with knowledge or feelings about the world or my self. With smoking, it can go so quickly that by the time you get back you are just scratching your head saying "okkaaayy, that was weird."
In the end, essentially what I am saying is smoking a little of DMT on its own first is good for understanding the feeling that can there for 6 hours with ayahuasca + Spirit. Remember you have Ayahuasca and the Chacruna. Smoking DMT you only have that accent. So it will be different. Even though it will be different in ways, it will be similar in ways. Having the intense feeling of being taken under or over with DMT is scary at first and smoking it makes it easier for you to let go or atleast not have the choice and come back fine, letting yourself know that it's you that is making it scary. You will be able to connect that feeling with ayahuasca, then possibly be able to work with it deeper.
Standing up on the surf board has got to be the hardest challenge. All else you gotta do is sail into eternity.
Hope it helped.
Dao