22yo civvies working that kind of job have usually not been many places or done much.....
I would simply invite her with no initial offer of compensation......
Something like....
"Hey..... All this hard work, day after day after day.... when do you stop to pamper yourself?....... Why don't you take the weekend off and come to New Orleans with me..... My treat!".....
and see how she responds...... It usually brings up the first objection to be overcome......
If she brings up work tell her "
If you want to come I'll give you whatever you would have made for the weekend as well as throw in some spending money while we are out there.....We will relax, have a good time, ..... Come on.... It will be fun....."
Playing a civvie is different then playing someone around the business (i.e. stripeprs)..... Initially offering her money to do something might so shock their senses that they get creeped out by you....
Then again... what would I know about this kind of thing!