A call to this number will elicit a quick response/reply with the required information. There are the four (4) major metropolitan areas which are used as starting points to the hotel. There may be more than one airport at which one can arrive, so the directions from the hotel are primary.
If this is insufficient or one requires transportation from BWI to the hotel, one may call: SuperShuttle at 1-800-258-3826 or http://www.supershuttle.com. The fee for the shuttle is $29 for the first passenger and $11 for each additional passenger. The distance from BWI to the hotel is 30.36 miles according to my comuter (Map Quest) but driving unknown highways in and about major highways may be a bit much for the average GI. Thererare 11 bits of directions, including 9 turns or whatever.
Best bet/recommendation: Contact the hotel vis the guidance listed.