Remember ma and pa frog were shocked at the fact naruto could throw such dense chakra-even in sage mode.
Controlling it would be a whole new ball-game (literally haha)
but water jutsus appear to have directional control quite a lot, as do fire ones, many times water dragons have changed directions etc etc, its just a matter of controlling the chakra.
I reckon naruto could do it, because he can do anything, thats the point of the story, that a non genius can do anything with hard work.
Yes it would use crazy amounts of chakra, but remember naruto has a large chakra amount, he can fire off 2 FRS per sage mode body, totalling 6 already.
Im also sure as time goes on he can use more than 2-3 clones to collect sage chakra.
Do remember the reason fukusaku didnt want naruto using more than 3 clones originally was because if naruto lost control fukusaku wouldnt be able to use that club he had to knock natural chakra out of him in time.
However naruto now has very very good, if not perfect control of sage mode, he mastered it beyond Jiraiya, so in theory he can certainly make 100 clones and allow them all to collect natural chakra-giving him many more FRS
Also remember chakra capacity increases with training and age, kakashis chakra capacity has definitely easily quadroupled at least, he fired off many raikiris against pain, and used MS twice,when he was training sasuke he said his max was 3 chidoris.
Personally narutos chakra capacity in the next 5 years (if he lives) is going to be stupidly huge, i mean more than kisames huge, its definitely got to be a bloodline of his to have that kind of chakra capacity.
The next best thing would be for him to make an FRS in each hand, and throw them together to form a pincer attack, or use many clones to throw, say, 15-20 FRS from many directions, expand them all, and they all hit the target, even byakagun would be useless, if he expands them all then theyd be totally 100% surrounded, though admittedly, firing off 15-20 FRS would be mental, itd definitely be one of narutos trump moves if he ever did that