When I pick up twigs and sticks, I stack them over by the fence, but by the time I am ready to tie them in a bundle, the bottom ones are weaker or wet and too messy to put a piece of twine under and tie a knot.
So i put together some PVC pipe as a twig holder.
Step 1: Get the Pieces
1" Schedule-40 PVC pipe
2 x 12" = vertical
2 x 2" = horizontal
2 45 degree Elbows
2 x 18" = ForeArms
2 pipe clamps
2 2x5 mending plates
1 piece of 1x4 x 30" pine scrap
Total is less than 10 bucks at Home Depot