The way I see it, if you can make a cruise missile stealthy after launch, why cant you make a missile stealthy prior to launch
Imagine how much money goes into making a fighter stealthy and then how much such a missile would cost...!
But yes there are stealth fuel drop tanks in existence and the possibility is there for stealth weapon covers.
SYRIA EXPRESS: RUSSIA IS FORCED TO INCREASE ITS FIGHTING POWER IN SYRIA

However, the 26 missiles launched are close to the maximum salvo of the Caspian flotilla (32 missiles). The Black Sea Fleet recently received two such small missile ships, there’s also the submarine Novorossiysk capable of a four-missile volley. Another sub, Rostov-na-Donu will arrive in December. Two Project 11356 frigates are undergoing sea trials. In other words, the capacity to launch cruise missile strikes in the southern strategic direction is still limited. Moreover, these missiles are expensive. Missiles supplied to India coast $6.3 million per shot. Finally, launching 26 missiles is no outstanding feat. The Yugoslav war saw 298 air- and sea-launched cruise missiles being used. In Libya, 110 Tomahawks were launched in a single day.
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The conclusions are fairly simple. There will be no effective offensive without expanding Russian military presence in Syria, and the Khmeimim airbase is limited to only 50 aircraft. In other words, Moscow is facing a choice of a failed action with all the associated geopolitical and image damage, or an intervention on a larger scale.
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First of all, the increase in Syria Express activity in its traditional form. Thus, on October 17 two amphibious ships passed through the Bosphorus simultaneously–Nikolay Filchenkov and Saratov, then Yama on 21st, Korolyov on 23rd. Western sources also note much higher “civilian” traffic in Syrian ports–an increase of container cargo traffic by 25%.
Secondly, the Russian Navy is buying up transports. Eight were purchased in Turkey. Crews are being recruited for them at an urgent pace. This branch of the express would allow Syria to receive 1000 tons of cargo a day.
Thirdly, there is heightened aviation activity in Crimea.
One is also left with the impression that the current offensive was mainly aimed at expanding the network of bases that could be safely used and supplied. Eliminating the rebel pocket north of HOms means easier supply of the large base on the outskirts of the city. Operations to the east of Aleppo are aimed at de-blocking a surrounded airbase.
The conclusions are clear. The offensive will not achieve significant success without expanding Russian military presence and weapons deliveries. Thus the presence will be expanded. But in any event, the success will not come very quickly. And it would be worst of all to try to rely on half-measures, to place extreme demands on allies and, last but not least, to prematurely shut down the operation if success does not come quickly.
http://southfront.org/syria-express-russia...power-in-syria/ Finally some sensible analysis.