Complete agreement with Marmalady. Moreover, making them fresh is part of their family appeal.
The good news, such as it is: Like any yeast dough, you can keep the raw dough, covered and refrigerated for a day or two in the fridge.
If you're stuck in a situation where you have to bring them, make them as much at the last second as possible. A few seconds in the microwave just to warm, and just before serving will help refresh them slightly. Powder them then.
Beignet, filled with fruit jellies and preserves, were a part of our family Hanukkah. All you need is a pastry bag with a wide enough tip. Now, with only two of us, and me such a lazy bum, Linda is lucky to get latkes and smoked brisket. One night a year, I'll do plain beignet, garnished Prussian (I know) style, with a little lemon juice as well as lashings of powdered sugar.
Say hi to Hanukkah Harry for me.