MOST of the info here is correct, however, as a 20 year computer tech. I would recommend NOT using wifi to hook up the printers. Hard wire the printer to the router (since you normally don't move printers around) and then use the wifi for your laptop. Although wifi works a lot of the time for printing it is still flaky and I would avoid it where I could and you can simply have your router in close proximity to the printer. I have not seen a wifi printer that does not have an ethernet (hardwired) port yet (although I've by no means seen everything) so this should not be a problem.
Also, if you spend a little more on your router you can get one with some amplification to pickup campground wifi and then connect any device to your router in the TT instead of having to connect each individual device to camp wifi. This is what I do with an external antenna and it works great.
Hope I didn't overload with too much info.