Bass, amp, speaker, strap, tuner (with or without walwart), instrument cables, extension cord, outlet strip, speaker cable, appropriate attire for the gig. I would suggest a spare set of strings, and extra battery for your bass and tuner as appropriate, and also a few spare cables. A cleaning cloth to wipe your bass down between sets and after the show. Possibly a water bottle and a protein snack.
If the gig is outdoors, check the weather and consider things such as jacket, hat, sun glasses, sun screen.
If you are expected to help with loading and setting up heavy equipment...gloves and possibly steel-toed boots.
If you read music, you may require a music stand and stand light. Most cover bands don't read music, but I have worked in corporate bands that did. Many reading bands will provide a stand and stand light.
The following reflects my expectation and there can be exceptions. If the PA is vocals only, nothing else is required. Bring a big enough rig for the gig. If the PA carries instruments, nothing else is required. In my experience if a DI, mic, mic stand, monitor, or anything else is required, it should be provided. However, since these requirements can vary from band to band...you need to talk it over with your band leader to see if you are expected to bring anything besides your bass gear.
My last touring rig was rack based. It had a rack drawer that I used to hold spares. I carried an extra DI and mic cable just in case. I don't normally carry a spare bass, amp, or cab. I have broken strings on gigs, but never had a bass go down, other than having the battery die. I had spare strings and battery, so not a problem. I have had amps go down on a couple of tours. I usually worked with bands that had full PA support and I was already running through a DI, so this was not a problem.
The last amp that failed on tour start making loud noises that sounded like a cannon shot in the middle of a song. I turned the amp off and finished the song. Our audio tech saw me turn off the amp and added bass to my monitor. He brought up a second monitor during the next song and I finished the tour running on monitors.
If the gig is outdoors, check the weather and consider things such as jacket, hat, sun glasses, sun screen.
If you are expected to help with loading and setting up heavy equipment...gloves and possibly steel-toed boots.
If you read music, you may require a music stand and stand light. Most cover bands don't read music, but I have worked in corporate bands that did. Many reading bands will provide a stand and stand light.
The following reflects my expectation and there can be exceptions. If the PA is vocals only, nothing else is required. Bring a big enough rig for the gig. If the PA carries instruments, nothing else is required. In my experience if a DI, mic, mic stand, monitor, or anything else is required, it should be provided. However, since these requirements can vary from band to band...you need to talk it over with your band leader to see if you are expected to bring anything besides your bass gear.
My last touring rig was rack based. It had a rack drawer that I used to hold spares. I carried an extra DI and mic cable just in case. I don't normally carry a spare bass, amp, or cab. I have broken strings on gigs, but never had a bass go down, other than having the battery die. I had spare strings and battery, so not a problem. I have had amps go down on a couple of tours. I usually worked with bands that had full PA support and I was already running through a DI, so this was not a problem.
The last amp that failed on tour start making loud noises that sounded like a cannon shot in the middle of a song. I turned the amp off and finished the song. Our audio tech saw me turn off the amp and added bass to my monitor. He brought up a second monitor during the next song and I finished the tour running on monitors.