Hi Mike - yes, we checked it out a couple of weeks ago, and was close to Jupiter. It is small, but you can see a bit of colour to its disc - blueygreen. I would find it hard to see with your naked eye though.
The Moon shouldnt be a problem if looking through a scope, unless its right on Jupiter. Your 4" should be fine for it.
If you download Stellarium (free and great) you can zoom in on Jupiter and see exactly where Uranus is.
www.stellarium.org
Am at work so cant do it, but will do a screenshot tomorrow from Stellarium to show you.
Neptune is a lot harder, well I thought so anyway.