>>2162808>Are there good wild camping spots throughout?Yep, with the caveat that Loch Lomond is one of the few places in Scotland where wild camping is restricted. Once you’re north of Conic Hill, you can be moved on and face a hefty fine if you’re ‘caught’ wild camping, a law designed to stop people travelling up from Glasgow to get pissed and spoil shit. Once you’re north of Beinglas Farm (Inverarnan) there are great places to wild camp every night.
I did it in five days, so got a camping permit at the southern edge of Loch Lomond then walked the length of it to a wild camping spot just north of Beinglas Farm on day two. Alternatively: you could camp on top of Conic Hill at the end of day one, stay at one of the camp sites on the shore of Loch Lomond (Milarrochy is supposed to be nice), or take your chances wild camping.
A few extra tips:
The pub and shop at Beinglas Farm are great. Highly recommend ending your second/third day there with a pint and visiting the shop the next morning to resupply. You could easily use the showers there for free too. No code.
There are drinking water taps all along the route (except on the coast Loch Lomond). You can easily get by without a filter if you bring a 2L camelback. Oak Tree Inn, Beinglas Farm, Green Welly Stop, Bridge of Orchy Hotel, Kingshouse Hotel all have easily accessible outdoor taps.
Kingshouse Hotel is worth a stop too. They have a really nice, free shower and toilet facility for hikers. If you’re on a five day itinerary, the shower won’t be much good (it’s about 1/2 way through the day on your route from Bridge of Orchy to Kinlochleven) but you can still freshen up.
Finally: The Devil’s Staircase isn’t that bad but the climb out of Kinlochleven is tougher going than expected.
I recommend the Grog and Gruel in Fort William once you finish.