I did early morning witnessing many times. We would drive around and find people waiting for buses or otherwise looking unoccupied and offer them magazines or tracts to read (usually older issues). I even had a return visit or 2 with some gas station personnel. Every now and then we would frequent the downtown bus stations (they were all on one street) and walk up and down looking for someone that we could talk to.
I actually enjoyed these methods of preaching much more as I wasn't normally in the hot sun and I actually found people to talk to and not just another 'not at home'. I'm a very outgoing person and if nothing else have at least been very well trained for public speaking by this org. I try to look on the bright side and get over the anger/hurt.