I was looking at those yesterday.
It looked like it will hold 4 ball locks in the bottom, and one or two on the hump.
Possibly the kegs on the bottom will fit without a collar.
Next time I go, I'll take a measuring tape and some 9" cardboard circles.
ETA: I went on over to Costco and measured it:
Haier 7.1 cf Chest Freezer
37"w x 23"d x 33"t
27" deep (bottom)
17.5" deep (hump)
3 kegs on bottom (no collar), 1 on hump (with collar). May fit 3 gallon on hump without collar.