Resources & Tips
Resources Most of the materials can be found at places like Home Depot, Lowes, Menards. A good hardware store that has "everything" is an excellent source for a lot more hardware choices. If you want to take the project to the next level I would suggest woodworking stores like Rockler's www.rockler.com or Woodcraft Supply Corp. at www.woodcraft.com/

Just bring the materials list with you when you go shopping and you'll save a lot of time. More photos of the easel.

Tips You can streamline the process and save a lot of time if you BUY EVERYTHING YOU NEED FIRST. Don't spare the glue when you are assembling, and take a little extra time - measure twice, cut once, and you'll have NO PROBLEMS! By putting a finish coat of a satin varnish (or polyurethane or latex paint) on the easel when your finished, it will preserve and protect it, BUT, if you PUT 3 COATS ON, it give it a professional look and be easier to keep clean.
More Tips You can customize your easel as much as you want after it is built by giving it your own creative paint job OR leave a natural wood finish OR stain the wood OR paint a painting right on the front of the lid. You could make it like a NASCAR logo filled racecar or gold leaf it. You could put your signature on it or your Plein air club logo or a quote from a famous artist, like yourself! I've painted the entire inside of my easels with a neutral grey so it doesn't distract while painting or mixing colors.
Equipment Tips To use the plein air easel in the field you will need to purchase a camera tripod. I recommend that you get a sturdy one with a solid mount (where the easel connects). You can find used/new ones on EBay, at some camera shops, the classifieds, or ask people you know if they have any laying around they would sell. A good backpack that the easel fits into and has room for other supplies can be found the same way.