Fair point I have done it both ways in the USA. A night in a hotel first is preferable. The Holiday Inn at Glasgow Airport is 200 yards from the exit from the airport. You could push your trolley there. Failing that any hotel in the city centre is a 15 minute taxi ride. Or if you are Inverness bound it is 10 minutes over the Erskine Bridge to the Dumbarton area. The Travelodge, Dumbarton is literally about 20 steps from the Glasgow - Inverness bike route which runs immediately behind it.