I used to pack a little bicycle hand pump for long trips because it is light and small - but I think I'll die of a heart attack airing up after a flat in this 100 degree heat. What's your preference - co2 cartridges or an electric pump? Which one?

Electric pumps are so small now totally worth carrying...

Go for the pump there are some good ones that air up really quickly, you might want to still carry a couple of co2 bullets if you run a tire off the rim they will pop it back on. If you just rely on the co2 you will need a lot of them for a rear.

This is one of the best motorcycle pumps i’ve owned.
Had it for a couple of years now and used it a few times a year, mostly for my riding buddies who have flats.

https://bestrestproducts.com/shop/cy...tire-inflator/

Ive been lucky so far, Have done about 10k of touring on my AT since I got it at the start of last year, and still no punctures.
I have been carrying a small plastic bicycle pump with me. Its a cheap and small insurance policy.
Am about to embark on another tour offroad and was thinking more about punctures etc.. and what I would do to get out of them.
I have a tin of foam reflator that should get me out of the **** if the hole is not big and I can find whatever made it and remove it.
But to date no experience with flats in the middle of nowhere. But I know they will come.

I did a small experiment for me own benefit the other day:
I let the back down to 1bar and reflated it with the bicycle pump.
It took me 3 min of pumping (with a bit of a break in the middle) to get it back to 2.5bar

I expected more sweating and effort actually.

On this next trip I am going with a friend and we will share tyre irons. I will pack spare tubes and reflate with the hand pump if it comes to it.
I figure that I will never be far from civilization and at worst I can get it to a stage I can limp to a service station and fill it up propoerly.

Not really what the question was but thought I would share anyway