One thing that just popped into my head and I don't want to forget is your licenses. Since this is border waters you're required to have a physical copy on you, showing the app isn't good enough. So if you purchase them online you'll have to print them, or if you go to the store you have to ask them for a printout since you don't normally get one. As they are just whatever paper you print them on I usually laminate mine with packing tape so it doesn't tear or get wet.