I was hoping some of the creative folks here could suggest something fairly compact that I could put together from the scrap pile.
Not sure what's in your scrap pile. If you keep a scrap pile, I'll assume you have a welder. Here is my suggestion:
30 or 55 gallon drum depending on weight you want. More on the calculations later.
A steel rod of appropriate length and diameter to extend between 3 pt lifting arms.
Angle iron to make a bracket for the top link and sufficient scrap (like re-bar) to anchor the bracket in the concrete used to fill the drum.
Some 4" to 6" pipe (steel preferable, plastic acceptable)
Concrete (you could use sand, stone, or whatever, but the rod, bracket, and drum would have to be attached to each other strongly enough to resist the forces the concrete would absorb).
Put the bar horizontally through the drum fairly near the bottom but with at least 6" of space around it for the concrete. You want the bar low enough so the weight will ride with the lift arms all the way down; this will mean storing the counterweight on blocks. Place the top link bracket appropriately, ensuring the anchoring rods will also be surrounded by concrete. Place a couple of lengths of pipe vertically, again so they will be surrounded by concrete. These will be holders for long handled tools (rake, shovel, peavey), and, if you use steel pipe extending a couple of inches above the concrete, hold chain with the hook over the lip. (Schedule 40 plastic will break if used that way.) Fill the drum more than 2/3 full; the space at the top can be used for chainsaw fuel, bar oil, or other stuff you use in the woods. After the concrete sets drill weep holes to let water escape from the space at the top and from the cavities made by the pipes. Make a "rug" from the drumhead or something else to help prevent chipping of the concrete from whatever you carry on top.
Calculations: Concrete weighs approx. 150 lbs per cu ft or 20 lbs per gallon. Four inch pipe displaces approx. 0.83 gallons per lineal foot; 6" pipe approx. 1.79 gallons per ft. A 55 gal. drum completely filled would weigh approx. 1100 lbs. Filled 2/3 full with a 6" pipe it would weigh a little north of 600 lbs. Decide how much weight you want and how much of a lip you need to restrain the stuff you carry.