This materials list is for oil but you can work in acrylics, pastel, gouache, watercolor or mixed media. No marble... too noisy.
9x12 Sketch pad (heavy paper) and water proof felt pen (fine)
Oil/Acrylic
A limited palette of warm and cool of each primary color plus white: Cadmium Lemon
Cadmium Yellow Med and/or Yellow Ochre
Cadmium Red Lt or Permanent Red
Alizarin Crimson
Ultramarine Blue
Prussian Blue and or Viridian
Titanium White unless you prefer flake or zinc white
Burnt Sienna or Van Dyke or Burnt umber
Tube Grays (optional but a few tubes of warm & cool values go a long way)
Black
If you have favorite pigments, bring em. There is no one perfect palette. I have a thing against tube greens... but you can bring those too.
A good starter palette is a warm and a cool of yellow, red, and blue, but if you want to augment this with, say, Kings Blue or Viridian or Rose Madder or Cad Orange, be my guest.
Oils: Utrecht and Gamblin are good paints for the money. Gamblin 1980, Winton by Windsor Newton is fine. Rembrandt, Grumbacher are also fine. Count on using a lot of paint.
Acrylics. Golden is golden.
Watercolor set Small inexpensive watercolor set. Set of watercolor brushes. Get the
cheap bag o’ brushes from Michaels if you don’t have any.
OR set of Gouache paints, as they are awesome and not terribly expensive. Watercolor mixing tray.
Thinner: Turpenoid or Gamsol or Mona Lisa, or you can go thinner free and just use Artists medium or linseed oil.
Artists painting Medium by Winsor Newton or Galkyd or Gamblin solvent free gel (optional).
Easel –there are easels in the studio for you to use during the workshop but you may bring your own if you prefer.. such as a French easel or I recommend a good portable and multifunctional easel that you can get from OpenBoxM or EasyL through www.artworkessentials.com. Tell them I sent you. I have several and my favorite is the Pro-Lite for small oil paintings (12 x 16 and smaller) and the Versa for pastels. www.OpenboxM.com for the open box m, which I love. Also I hear good things about the Strada easel.
The easel you use can somewhat be determined by the size canvas you wish to work on.
Tri-pod for the Box type easels.
Wood Palette (for French easel) – or plastic or decent mixing space Palette Knife (tapered tip)
Palette Scraper
Brushes:
Bristles are great – sizes 2-12 flats and filberts. You can also augment with sables or cheaper synthetic flats and filberts for blending (I use synthetic flats and filberts a lot for blocking in).
Canvases:
For most classes, bring smaller canvases, a lot of them are better.
4 or 5 - 12x16 or similar canvas panels, taped off into quarters for small studies.
4 - 11x14 to 12x16 for the middle studies (not taped off)
1 or 2 - 16x20 for the larger version.
If using Frederix or similar gesso-primed crappy surface I recommend a brush coat of gesso or two. Raymar, Windsor-newton and Pintura are good and fairly inexpensive. Canvases from www.windriverarts.com have a great selection of primings & surfaces.
If you are really ambitious, you can pick up some cut sheets of Masonite or sand-ply from Lowes/Home Depot and give them 3 coats of gesso.
Misc.
Paper towels (viva) or lots of good painting rags
Painting reference; field photos taken, studies, sketches, iPad with pics etc.
Latex gloves if you so desire
Artists umbrella (optional) or hat
Sunscreen, hat, umbrella, bug spray, water, snacks
Sense of humor