In reply to Hefty Soph:
I'd second Soph's suggestion. If you can book the EUMC bothy, it is pretty well kitted out now (after a big effort to do it up when a storm took the roof off a few years ago) and, depending on what kind of car you have, you can actually drive all the way up to the bothy to avoid lugging heavy packs. A standard 2wd hatch can get up there ok with a bit of care imo but obviously what "my car can get up" varies a lot from person to person!
From there, you can do the 5 sisters and walk back up the glen track, so no need to go near the road at all.
You can also have a nice day out, starting as for the 5 sisters but going E from Bealach an Lapain and doing saileag, Sgurr a Bhealaich Dheirg and Aonach Meadhoin (the three brothers), you can tack on ciste dubh as well if you feel you are going well and have time. Then back down the glen to the Bothy again.
You also have a shorter day in Beinn Fhada which is also a nice day out starting directly from the bothy.
If it's too windy on the tops or too much clag or whatever, there is a pretty long circuit you can do around Beinn Fhada which has a good path all the way except a few kms in Gleann Gniomhaidh and is very straightfoward to navigate. The route goes down Gleann Lichd, up Glean Choinneachain, across Bealach an Sgairne (high and the most exposed point of the circuit), down Gleann Gniomhaidh then up Fionngleann (past Camban) to get back into Gleann Lichd again. A couple of the river crossings in Glean Choinneachain demand a bit of care and can be interesting if it's been very wet.