If the OP is really that worried about restrictions on their alt account (I can only presume they meal six minutes between posts and no signature) then start an alt account, post details in the known Alta thread, post a note (neutral) on the altar trust feedback page, then post a dozen times - even if it's just once per day so that when it comes time to travel, your alt account is ready to go.

As to merits, start a meaningful thread which you feel will earn you merits and you are set to go.

I've seen hostility towards persons who merit their alts. I don't feel it's a good move in part because you need four merits to send one via your alt to anyone you want to merit.

(But why the need to merit on the road anyway?)