This isn't a huge discovery like I found the hope diamond or anything, but it's good for those looking to diversify their portfolios of Hoth Rebels...
So we all know the VTSC Hoth Han Hat is a good replacement cap to make your troopers look a little spiffier and different. I've also found that, if you feel the urge, adding cloth scarving to helmets isn't difficult either, fi you can find a good thin fabric for the scale. Check out your local fabric store for scrabs of dark browns, greys, and such, in light knits.
But, I've been testing some blasters in the holster, to see which fit and which don't. The "standard rebel" pistol that Captain Antilles and others have come with works quite well right off the bat, and many Hothies are seen with it! So keep that in mind when diversifying your troops.
Also, VOTC Han's blaster pistol, which I can't speak for all but I have a ton of these, fit well as well, and are a fairly generic looking gun. The pistol the Trooper comes with already is actually similar (or identical) to Ponda Baba's from the Cantina, and is also commonly seen on Hoth... It helps give the troops a more ragtag look too, with guys having a wide variety of sidearms.
Just food for thought if you found lots of the bearded troops, and want to spice them up a bit.