Creise is not so bad but there is often a cornice and a tricky exit onto the main ridge from the connecting ridge of Meall a' Bhuiridh. That junction can be hard to locate in poor visibility.
Stob Gabhar is a good winter hill. If you do the circuit anticlockwise then you have the option of finishing by the narrower, harder "Aonach Eagach" E ridge or taking the easier descent by the SE ridge.
Na Gruagaichean is usually ok apart the section mentioned in previous post. it can be combined with Sgurr Eilde Beag and Binnein Mor which in themselves make a grand day out.
Buachaille Etive Mor is a good one. If you don't like the look of the steep avalanche prone icy snow slope that often forms in the back of Coire na Tulaich then you can access the ridge by by the Northern spur of the coire. Descent into Glen Etive from the col at the top of the coire gives a good way off in hard conditions or you can continue SW along the ridge and descend from the col after Sob na Doire into the (hopefully frozen!) Larig Gartain, or again, into Glen Etive.
Buachaille Etive Beag is also fun, starting from Glencoe rather than Glen Etive. There is a narrow section heading from the central col to the southern summit but there is no great great difficulty. This often forms a spectacular cornice.
Stob Coire nan Lochan in Glencoe can be good. The path up Coire nan Lochan ices up readily so needs care, but once in the upper coire you have a choice. The slopes to the W of the summit buttresses give a fairly straightforward route, in suitable conditions there are a number of easy gullies you can followor you just plod up to the RH skyline and follow it round. The E (left) side gives a more challenging route of ascent but not desperate. You can then complete the circuit by descending the previous. The Coire holds snow well and is a popular place to practice your winter skills.
Above bridge of Orchy Ben Dorain and Ben Dothaidh make a good day out although navigation on Dothaidh can be tricky in poor visibility.
However, when all's said and done the level of "winteryness" encountered at that time of year is pretty variable. Although you can get good snow cover and hard conditions, sometimes it's like summer! Just keep checking the SAIS and MWIS so you have an idea of how things are shaping up (or not).
Hope that gives you some ideas. Still impressed by your plan to camp.
Ian
www.mountainfreedom.co.uk