Pick your number of days depending on fitness levels. I would strongly recommend doing it the first time over a solid 7 days / 6 Nights. This way you will know for future if you need more or less days. Remember you are here to have fun and not feel miserable 
Camping route to follow β Start Milngavie then go
1st night β Drymen campsite
2nd night β Cashel campsite
3rd night β Beinglas campsite
4th night β Inveroran hotel (You can camp behind the hotel and still use the bar for food etc )
5th night β Glencoe mountain resort campsite
6th night – Kinlochleven Blackwater campsite
7th day β Walk to finish in Fortwilliam
The campsites can be paid online or on arrival on the day
Accommodation route to follow β Start Milngavie then go
1st night β Balmaha Bunkhouse
2nd night β Rowardennan Youth hostel
3rd night β Drovers inn hotel
4th night β Tyndrum Lodges
5th night β Glencoe mountain resort pods
6th night β Kinlochleven Tigh na cheo
7th day β walk to finish in Fortwilliam