Reduce the load by using modern equipment. Play and sing through the PA. Use Guitar Rig 6 instead of lugging a Twin Reverb around. Use a Mexican Strat instead of a Les Paul. Leave the spare repair parts and tools in the car. Be glad you are not a drummer.
Billy
Amen,
For my instrumental (guitar with backing tracks) gigs I use a line array pa (ev Evolve 30M) a direct box (Tech 21 FlyRig or Quilter Superblock), a telecaster (usually), an Ipad and a bag of cables.
The base of the PA weighs 32 lbs. 2 trips by myself. pretty easy for a64 year old man.
That handles 99% of the gigs, inside or out.
For bigger I own the Ev Evolve 50 whose cabinet weighs 44lbs. Less than a Vibrolux.
The line array has great sound clarity and coverage. Not too loud inside but plenty of gas for an outdoor cafe or swimming pool.
If just playing guitar I use a Quilter Micro Pro 2 or a Fender Tonemaster Deluxe. Both of them sound great and weigh 22lbs or .5 Fender Vibrolux.
I'm done carrying tube amps and 18" cabs.