The 101 is technically too big, too heavy and not supposed to be pulled by the M1009 according to the manuals.
That being written, I used my M1009 to pull my M101A2 full of camping gear for a Scout camp out last weekend. I don't have sides, bows or a cover for the 101. So, I put my shade canopy over the 101, set up my cot and had a great open air sleeping area out of the ants and snakes. Spiders still got in.
A M101A2 is down just a little at the front when hooked to a stock tired M1009. I have a picture on my phone, but my phone is out in the parking lot. Hopefully, I will remember and post it up here.
M101 differences.
M101- same bolt pattern as the M37 truck and no surge brake.
M101A1-I don't know the difference between the 101 and the A1 version.
M101A2-8 lug bolt pattern and surge brake, meant to be pulled behind the CUCV trucks.
M101A3-8 lug pattern, offset axles so HMMWV rims will fit, meant to be pulled behind the HMMWV.