I'd suggest you'd need to be confident with vacuum distillation/sublimation in order to give this a try. Even that is questionable if you think about the stages of the procedure. Distillation of DMT freebase from an aqueous alkaline plant matrix would present some problems.
∘ the boiling point of DMT is higher than that of water (would steam distillation work?)
∘ DMT would solidify in the condenser unless you use hot water (~60-80°C)
∘ the plant matrix would be vulnerable to charring and
∘ especially if using reduced pressure, the bumping would be terrible
∘ alkaline solutions will attack glassware, especially at elevated temperature
∘ at this stage, the idea of an entrainer for co-distillation comes up (
cyclohexanol was reported to work but you might not have access there yet.)
∘ at this stage it might start looking like solvent extraction is a load easier.
Adding base to the moist plant material, drying, then sublimating in a hard vacuum may or may not work. It would be an elegant solventless method if it did.
By all means try any of this - and be sure to report failures too - but also have a good think about whether each stage introduces any unnecessary complications.
“There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
― Jacques Bergier, quoting Fulcanelli