Ed - are you playing a trumpet or cornet? you may find that a cornet might be a little easier to hold steady since your hands are slightly closer to your body. If you can borrow a cornet for a day or two you might want to try it and see if that helps. Good Luck
Dave, at present I don't see or feel such as a problem and yes, I've cornets as well as trumpets. I don't depend on my props but I do find them helpful and comfortable especially with a marching mellophone (F). Really, it's not yet a matter of feebleness but I'm prepared to thwart its onset should it come.