I fly both glow and electric. Besides my usual flight box, which carries fuel, starter, a 12 volt motorcycle battery, transmitters (I have three), glow driver, extra props and glow plugs, paper towels and Windex, tools, and whatever else I can think of. The only thing extra I have to bring to fly electrics is a small camera bag I use to carry the batteries, which I charge up the day before. Lipos hold a charge for a really long time! No field charger or gas generator (?) required. But then, I don't fly anything electric larger than 450 size, which includes everything from my tiny UMX Beast, to my "normal" sized 56" clipped wing Taylorcraft.
Gas, glow, or electric, It all comes down to whatever you're most comfortable with.