I'm using exactly the same painting material at home and for plein air. I found a perfect organization with a box that I completely transformed at my convenience. I'm using it on a table for my small paintings at home and recently adapted 3 feet for plein air which iwork perfectly. Everything fit just right into a bag and remains quite light and handy to carry.
My box in tuscany
A picture of the view I had and my painting below.
On the far right I could see Siena in the distance
It was the first time I painted such a long size (21.5inch) with my box but it worked well
Nice sunny and hot summer this year in Toulouse, time to get lazy, read, napping, of course sketch and paint... And go to toulouse plage, a place by the river garonne arranged like a beach, with nice white sand for children to play, lots of game and activites, water fogger to refresh, Let.s go before september comes!