For the C-152s I typically fly:
Range:
From 315nm at 75% power at 100KTAS. Up to 430nm at 45% power at 77KTAS. This varies with altitude - generally the higher you go, the slight lengthening of range.
Endurance:
From just over 3 hours at 75% power. Up to 5.6 hours at 45% power. Again varies with altitude - generally the higher you go, the slight shortening of endurance.
The above figures assumes full weight, leaned mixture for cruise, standard temperature, zero wind and standard (ie. not long-range) fuel tanks. There is another 45 minutes reserve.
Where I learnt to fly in Florida, A.R.R.O.W. documents must legally remain on board. A good thing IMHO.
Now that I'm back in the UK, I've gone and bought a C-152 "Information Manual" which is essentially photocopied pages out of the original 1981 POH/FM. I think it's a good idea to study the POH/FMs when you've got time.
I plan conservatively. This means max 2h30m (fuel pump to fuel pump) for me - less if flying in IMC - although I'm sure more experienced pilots could squeeze more out of it.
More advanced GA aircraft actively measure fuel consumed since the last fill.