I get the Victory Pride and it goes all day and well into the night as well. I've never needed to do a top-up charge, and as soon as we get back to the room it goes straight onto charge. Unplugging is the last thing I do before we leave the room for the next day's activities, too. I don't think I've ever dropped more than one light - and that time it was really cold plus it was dark (11pm) so I had to put the headlight on or a little while.
Other than that, I've always been fine. For this year's hire I was discussing with the renter company's co-owner (lovely lady) about whether I could go down a size purely for the weight thing (getting it in and out of the car), but she thought I might need to take the charger with me and do a top-up charge at lunchtime, for example. Rather than having to worry about whether my battery might go down more and stress about finding somewhere to charge it (and for long enough to make a difference), I paid the $20 more for the bigger machine and the peace of mind.