For my birthday, my husband bought me a small, aluminum outdoor easel. It's not the latest Soltech easel (pricey, but with a box attached for palette), but it is so lightweight and portable and quick to set up that I will now not think twice about packing up supplies and hiking around the property. Yesterday, first time this year, I did just that.
I worked quickly and finished in 45 minutes. This painting is 8 x 10 inches, not a show stopper, but a nice little study and an encouragement to do this several times a week.