Some plein air easels for your consideration.
I like the 'en plein air pro' because it's light weight, very portable and quite affordable. Here's a video of the set-up.
https://www.stradaeasel.com/pages/strada
http://artboxandpanel.com/
http://www.openboxm.com/store/c9/Lightweight_Kits.html I’ve owned this one in the past and like it because you can get away with using a lighter weight tripod. Some of the boxes require heavier tripods. They’re not cheap though.
http://www.artworkessentials.com/
http://www.madisonartshop.com/pochade-box.html?cmp=googleproducts&kw=pochade-box&gclid=CjwKEAiAjvrBBRDxm_nRusW3q1QSJAAzRI1t8cY8znhWDS5_sKm2LHoQs07BQVJu3yMwWAqusiKgUBoCQrbw_wcB When you look at this one – called the Sienna Plein Air Pochade Box don’t freak out at all the wood they’re showing. They’re showing all the additions you can make to the basic easel. Click on some of the thumbnail links to the left to get a better idea.
http://www.joshuabeen.com/merchandise/portable-painting/day-tripper-easel
http://www.jerrysartarama.com/anderson-swivel-easel
The tried and true Jullian French easel (1/2 box) http://www.jerrysartarama.com/jullian-original-and-half-box-french-easels
https://guerrillapainter.com/
https://www.stradaeasel.com/pages/strada
http://artboxandpanel.com/
http://www.openboxm.com/store/c9/Lightweight_Kits.html I’ve owned this one in the past and like it because you can get away with using a lighter weight tripod. Some of the boxes require heavier tripods. They’re not cheap though.
http://www.artworkessentials.com/
http://www.madisonartshop.com/pochade-box.html?cmp=googleproducts&kw=pochade-box&gclid=CjwKEAiAjvrBBRDxm_nRusW3q1QSJAAzRI1t8cY8znhWDS5_sKm2LHoQs07BQVJu3yMwWAqusiKgUBoCQrbw_wcB When you look at this one – called the Sienna Plein Air Pochade Box don’t freak out at all the wood they’re showing. They’re showing all the additions you can make to the basic easel. Click on some of the thumbnail links to the left to get a better idea.
http://www.joshuabeen.com/merchandise/portable-painting/day-tripper-easel
http://www.jerrysartarama.com/anderson-swivel-easel
The tried and true Jullian French easel (1/2 box) http://www.jerrysartarama.com/jullian-original-and-half-box-french-easels
https://guerrillapainter.com/