Tardiness would lead to you losing a lot of the opportunities that might have ended up changing your life once all has been said and is now out of the way, so it is highly recommended that you plan things in such a way that there would no chance whatsoever for you to be later than you need to be. In terms of party bus etiquette, being late can be even worse than might have been the case otherwise. The reason behind this is that party buses need to leave at a certain time otherwise all of the events that have been planned over the course of the day would end up getting out of order and no one would end up having fun if that’s the case.
One cannot overstate the importance of showing up to a party bus on time. The schedule for the North Myrtle Beach party bus in question is probably going to be quite clear, and if the host has texted it to you then you should check it multiple times to be absolutely sure that you know when you need to be there. That way even if someone else ends up being late you wouldn’t have to worry about this at all since it has nothing to do with you and all of the social wrath that the tardy person would incur would not end up being directed at you without a shadow of a doubt.
If you need to be there at a certain time and you know that it will take you half an hour to get there, try leaving an hour before time. That way you would start getting dressed earlier as well.