My solution for my quadriplegic son, beginning about 13 years ago, was
not to use a leg bag at all. I mounted a black utility bag so it hangs
off the front of his power chair base, behind his lower legs. We put a
big 2000-ml bedside drainage bag in that, and run the tube inside his
pants, up his leg. We cover the transparent tube with the kind of black
flexible wire-concealing wrap you can get at Radioshack.
The tube connects at top to his Texas or Foley cath (depending) and the
tube is held in place by a white strap with velcro clamp.
When the drainage bag gets near full, we just take it out, open the
valve, and either fill up a bottle or two, or hold it over a toilet and
let it drain.
There is virtually no odor except when draining; it can go without
draining three or four times as long as a leg bag; and it is much easier
to manage in just about every way.
Richard Galli