Painting outside or plein-air can be a pain if you carry too much stuff with you. Sometimes you might have to lug it all into the bush, up and down hills or wherever you have to go to get your subject matter.
All you really need is a small panel, four colors, yellow, red, blue and white, something to put your painting on such as a small folding easel, three brushes, small, medium and large, a palette, paper towels and medium. Water for acrylics or turps for oils. Take a squirt bottle full of water if using acrylics. I don't use turps in the studio but outside it is well ventilated and turps dry fast. I finish with oil later back at the studio. All this stuff can go into a back-pack or some other packing device of your choice. Some use an easel with a drawer or art box. A folding stool is optional. I like to stand when painting. Also a hat to keep out the rays is good these days.
I prefer to use acrylics when painting outside because they dry quickly and I don't get paint all over myself and the car. Not so good if the temp is below zero. Acrylics don't like freezing temperatures. Here in Canada it gets cold, very cold. So warm clothing or layers of clothing are best when temps are below zero and the wind and snow are blowing. Don't forget your boots.
