Brett, have a great flight. If you are flying the aircraft from your picture than you have 100kts yes? Thats roughly 20 minutes for 25nm?, if you cannot look outside the cockpit, see bad weather and get your self home than we are getting into human factors and poor decision making territory. This is what you are actually exercising and developing by using your 25nm area of operation. Your a new pilot so I'd say you will be paranoid about the weather, I know that I still am.
25nm is a fantastic little bubble to get out and learn heaps about being PIC and settling into the aircraft so that you get the most out of your navs. Unless your home strip is woomerra I cant see how you wouldnt have some prominant land marks to keep you on track.
Get out and have fun, dont let the 'hypothetic VFR pilot' scare you out of it. Chances are you will rock up and there wont be any clouds for 200nm, thats if the weather gods are happy with you!:thumb_up: