A fairly common issue that can end up arising among people that are looking to rent some kind of a charter bus is that they might need to figure out how they can fit enough people into the bus in question. You might have two options available to you in this regard. One of these options would be an absolutely massive bus whereas the other option could potentially be a really small one. This is a peculiarity of the industry that you must contend with, and often the only way in which you can do this is by renting the smaller charter bus and maximizing how much space you are able to use in it with all things having been considered and taken into account.
Smaller buses are going to be a lot cheaper than larger ones and as a result of the fact that this is the case you can use the money that you are saving to try and give the people riding in the bus a bit of a treat at this current point in time. That said, the affordability of Seattle charter bus prices does not change the fact that you need to figure out a way in which you can maximize how effectively you are able to use space as well.
You can start off by looking into stowing all of the luggage in the overhead compartments. This can almost double the amount of space you would have without a shadow of a doubt, to the point where everyone would get some leg room that they can use to spread out and have a good time. The more leg room you have, the easier your experience would be.