[CentOS] Formatting print with awk and ORS

I have a command I execute:

awk 'BEGIN { ORS=" " } { print "\"" $1 "\"" }' input_file

which gives me exactly what I need, all field one's in quotes on one line
each separated by one space. I now need to print a single quote around all
of this, but the ORS flag is screwing me up, it's causing every attempt I
try to repeat for every record.

Anyone got a pointer how to do this?

Thanks!
jlc