When you think about your guests, you know that there are several things you need to provide to them. You are going to have to provide food, drinks, and most importantly, appropriate bathrooms.
The latter could prove to be a problem depending on how your event has been organized. You need to be careful not to end up in a situation that makes it hard for you to achieve the results you want. You are very likely to need portable restrooms for weddings or functions if you are going to provide the kind of solutions your guests will find ideal.