I don't do well with travel at all. Going to the grocery store is about all I'm up for.
Traveling is a sustained activity. You have to hold up your head, your arms, tense your legs, etc. It asks a lot of the body. And I'm afraid there's not much you can do but have someone else drive! Blasting the air helps for awhile but people with MG just can't deal with long-term anything.
There's no pill that will help. Provigil might keep you more awake but coffee h as been shown to do the same thing. Any drug that would help you relax would be a muscle relaxant! That would make MG worse!!!
Maybe your husband's driving makes you tense.
Meditation would help you to relax. Maybe music.
Travel and I just don't mix anymore. Sorry.
Annie