1) I would not give my personal information to a man I do not know and I would not accept a check either.
2) Actually, personally I would not make a 3 day trip with someone I do not know and with whom I have not already made love.
3 days is long! It is sometimes difficult to stay in a good mood for a full hour with a client! But 3 days...
Some clients may have an unbelievably boring conversation, some may have bad body odors, some may be boundary pushers, some may be violent, some may be drunk all the time, some have very bad characters, others speak poor French / English and it is difficult to communicate, some snore and wake you up constantly at night, etc ...
When one or more of the situations I've just described happen and you're gone for 3 days with someone ... you're going to find it very tedious and will not be able to leave easily.
I have often traveled with clients... but these were clients I knew well.
Obviously it's only my personal opinion. Some may be more daring than me.