Hello again Kraken,
Very cool that you received Sapo from a Matse. Sapo is also another common name. Feel free to express it.
Dream medicine it is indeed.
After every kambo use, my dreaming becomes stronger.
how best to connect with the spirit,
My advice here is to always have an intention. That is you initializing dialogue with the medicine and respecting its sentience.
For ceremony, I do drumming and chanting to guide participants into a meditation to clarify their intention and invite the spirit of Kambo
Great. I've seen some shamans use certain kinds of palm leaf rattles that are also used to smudge a person by wiping them off.
http://www.singingtotheplants.com/2008/01/leaf-bundle-rattle/Sometimes hard to manage making your own drumming, or rattling when juggling Sapo stick, burning stick, knife, spray bottle, smudge, ect.
I had one friend who I must have applied like 20 or 30 burns too, till purge, and even then only purging through sweat and a bowel movement.
To the indians, a purge might not be necessary. But their diets are cleaner and they consciously do things to purge themselves of toxins.
I would recommend pushing the person till they purge. This is a significant part of the healing.
shower
I think a shower following is a fine idea, it is grounding. And cleansing to the largest organ in the body, the skin.
Sadly it would take me about a 7 hour drive as well to meet you at the edge of N.Y / Ontario.
Again, welcome to the forum, and others will chime in soon.