yes....tell them you are a location photographer....do what works for you!! I get calls everyday for 'studio' work....i say no, i dont do that...i dont do formal portraits and i refer them to other photographers....they appreciate it...i'm not going to do something i'm not good at, it just looks bad on me in the end...do i worry i just sent away potential business...no, i coudlnt accomodate them....
ok, you are in the heart of downtown and you have a baby....do you take your baby to your studio shoots? you cant be professional taking your child...you have to set soemthing up, find a way to make it work...i do engagement shoots in alleys...they are awesome, people love them! but they are modern/trendy and dont suit everyone....do you have a park nearby? ok, maybe you have to drive 1/2 hr....then drive...put that into your price....
SCout locations that will work for you and meet your clients there! I keep a list of places that work good at certain times of day/seasons/weather conditions so I can last minute change plans if things dont work...i dont go driving aroudn with my client wondering if this will be good...i've planned ahead and i find what is good!
there is alot to consider being a "pro".....