thanks guys...not an option to stay at airport as i have already booked and paid for cheyenne. trip advisor is flooded with bad reviews re all the various shuttle companies...soooo many people let down where companies didnt show up or left them waiting for hours.people struggled in some cases to get their money back too!! theres soooo many bad reviews that i find them hard to ignore.their advice is NEVER pay a shuttle company in advance... and to just take a taxi as they are similar price if not cheaper anyway...BUT will there be a taxi waiting that is the question!