Hunter Specialties make most popular camo blends in burlap aor netting that comes in 54"x12 foot rolls or even bulk 75 foot rolls..
Any archery PRO Shop can get it for you...
http://www.hunterspec.com/products/N...Burlap/all/all
They have a lot of patterns..may not be Realtree Xtra brown ...but so close it really shouldnt matter...they have all the popular Realtree camo patterns...
IMHO it doesnt matter what pattern you use as long as it isnt too dark, as the seasons change the dark stuff really stands out...
Use as much natural foilage, grasses and branches to mix in the netting...
I Use many blinds each year sucessfully with elk...as we need a lot of them I simply make what is called a debris blind...just anything natural like dead trees branches, some live trees in early season when clearing shooting lanes, and tall grasses and weeds...and they are extremely effective...
Neil