What I’m hearing you say is ‘this is a mental game for me.’ So yes, prepping with good solid meal with plenty of fat can be your first ‘self talk point.’ (And when you talk to yourself, Call Yourself by Your First Name! It really works)
What’s your game plan? Is there something you enjoy that you could do in front of tv if that’s where you want to be? Some sort of hobby or crafting? Just as you have strengthened your ‘muscle’ for fasting, you can strengthen your “Not going to Snack” muscle.
The success you’ve had abating your MS symptoms is amazing ~ no doubt you can conquer this minor issue as well. Good Luck!