Golf Carts - Electric vs. Gas Revisited

To start with, I have searched the R.A.S. archives for information
regarding the gas vs. electric question. I've also done a fair amount
of research outside of R.A.S. regarding towing with golf carts.
There's not much info to be found in this "towing" subject area.

I was hoping to get some additional info from the folks who use
electric carts for glider operations. Can anyone quantify how much
towing can be done with an electric cart on one charge (given good
batteries)? If I could gauge how far they'll go on a charge, I'd have
a better chance at making the right purchase decision based on the
amount of activity at our club on a busy day.

I've been told the big advantage of electrics is the speed control
while towing. I did a little testing with a gas unit and I feel it's
perfectly suited for glider operations. Quiet, powerful, good speed
control and they run forever on a tank of gas. I'm just curious as to
how much better the electrics are at towing compared to gas. When you
consider the hassle of electrics (charging, battery degradation over
time, expensive battery replacement every 3-5 years, giving out before
days end, etc.), is it worth it? I'm getting a lot of advice from
people (a lot of them don't own golf carts by the way) to go with
electric. Are the electrics that much better?