A companionship depends on you. If you are sociable or easy-going you may take a lone trip. You will be fine – participants are very nice and will surely want you as their companion.
However if you are a loner you may find yourself bored. You should rather take a friend with you.
Though, with every following convention you will meet more friends. After some time you may lack opportunities for attending panels since you will want to meet with someone all the time.
Posted in: Conventions FAQ