I have a
Furman AR-1215 in a small separate rack for ease of handling. It stabilizes the line voltage in addition to the other benefits of protection / conditioning. I use my AxeFX at home, and in my studio, without using it because I personally built and wired those environments. For anywhere else in the world, I carry the Furman, and it sits off stage near the amps to provide clean tasty electrons to my toys. It weighs 12 pounds.
I have been a professional musician for 30 years. I've seen all manner of completely insane stuff where power is concerned; from (fairly common) hot / neutral reversals to really scary stuff like 120v circuits accidentally miswired as 240v. I take a three step approach to every gig when I'm handling my own gear - and insist on having others do this when my gear is being managed by someone else:
(1) Check EVERY stage outlet with a cheap $5 plug-in circuit tester to verify it's correctly wired and grounded. Any outlet that is dead or miswired gets covered with a piece of blue painter's tape covering the outlet, marked with the date and the specific issue noted (that tape is easy to cleanly remove). Good outlets are marked with painter's tape so we know they've been checked.
(2) If enough healthy outlets are identified for the performance, we just inform the venue owner / manager of our findings and use the good outlets
(3) If we need to fix outlets before we can play, I discuss it with the owner / manager and explain what I would like to do, and get their blessing. I always have tools with me and can rewire outlets pretty quickly. If they prefer to have someone on their staff do it, that's even better
I developed a rigorous approach to testing and verifying stage power as a result of a heartbreaking amp kerblooie incident due to a 240v miswire in a club that we'd played many times. The fuse in the amp instantly burned out and then ARCED internally, burning up a lot of components inside. Even the cheapest power conditioner might have protected my amp from that apocalypse. One positive aspect of that event was that I learned a lot of tube amps from sitting next to my tech for several days while he patiently resurrected my amp.
My strong advice to you is to make the investment, and learn to love the additional 12 pounds of power conditioning as an insurance policy for your beloved AxeFX.