Oh definately they can be done in b'cream and kept for months. Just find a good b'cream that crusts. I think I posted a recipe for airdried b'cream flowers many yrs ago but not sure....try a search in the recipes. If you can't find it, use the Wilton class b'cream and cut down a bit on the shortening - the less used the more it will crust/dry. Use it in the stiff consistency or just add a little bit of water until you can pipe w/it w/o hurting your hand. For yrs that's all I ever used to make my flowers
And they will not melt unless it get over like 90 degrees in the car
I always made mine on a flower nail covered w/a 2" square of wax paper....remove from nail by the wax paper and set on a cake board, then they can go in a cake box for the trip.