OK, I'm more than half way there - I have five so far tonight!
Tried last night but clouds in the wrong place at the wrong time. Late this afternoon we moved from rain to clear breaks and I was able to observe Mercury, Venus, Mars and Saturn in a 4" f5 refractor. Add the Earth and I have five!
Nice crescent in Mercury - first time I have seen it through a telescope.
In a few hours, I go out with the bigger scope and with the Argo Navis warmed up and I should be able to knock off Neptune, Jupiter and Uranus - clouds permitting. I also have a very bright Moon to contend with not too far from Neptune.
I'll report back!