Re: Long Drive Home with Grafts
You should have no problems if the grafts are placed in a cell builder with plenty of bees, food (carbs and protein), and ventilation (if there are plenty of bees, you won't have too much ventilation).
Don't think of this as a way to move the grafts, think of it as you cell builder.
If the goal is to be able to raise some queens from the stock of whomever is giving the class, eggs are a bit more hardy than larvae, and maybe you can bring a chunk of comb with fresh eggs home (in an incubator or with some bees), and graft from them when they "hatch" a few days later, after you are home.
The perils of benefactors; The blessings of parasites; Blindness blindness and sight -Joni Mitchell 'Shadows and Light'