Having a color laser printer would be the best to have. I thought about bringing one down but I found that the color lasers I checked out were huge and extremely heavy compared to monochrome lasers or ink jet printers. I ended up bringing down a monochrome laser and 95% of the time I’m happy with it. It is the odd slides that have color would be advantageous. In place of the extra weight of a color laser I would bring an extra toner cartridge (in case you end up printing a lot) and paper.

The cheapest blank paper I found here is 18EC or $7US for 500 sheets.