A chair can be worth the space
A chair is a defensible luxury on a motorcycle. If you intend to sit outside for two hours after riding, it may get more use than several pieces of supposedly essential camp equipment. If you arrive after dark and leave at dawn, it may never leave its bag. The length of the evening matters more than the length of the trip.
At a campground with a picnic table, the decision gets harder. You already have somewhere to sit and eat. A chair then buys a backrest and the freedom to face somewhere else. Decide whether that is worth carrying. There is no prize for spending a weekend uncomfortable to save a little packed weight, but there is also no reason to bring furniture you will walk past.
Before buying, sit in the chair for longer than a minute. Try getting out of it in riding pants. Low seats can be awkward even when the fabric itself feels good, and a narrow frame may press exactly where you don't want it. Check the manufacturer's load limit and test the packed bag against the opening of your pannier. A light chair with a long frame can be harder to carry than a heavier one that fits inside.
Small feet can sink into soft ground. A compatible ground sheet or wider feet may help, but count those parts in the packed size. A sit pad is the simpler option for short stops and occasional evenings on the ground. It gives you a dry barrier, though it cannot supply a backrest or raise you to table height.
Buy the table after you have cooked a meal
Tables look useful because camp involves so many small objects. The question is which of those objects actually need a table. A mug and a book ask very little. Chopping ingredients or working on a stove asks for a firm surface at a usable height.
Cook a meal with your existing kit before adding a table. You may need only somewhere to put a lid and spoon. Or you may discover that crouching through all the preparation is the part you dislike most. That is a reason to consider a taller table, even if a lower one packs smaller.
Check wobble with the load you intend to use. A fabric tabletop that holds a phone can still let a mug tilt. If the table will support a stove, it must meet the stove's requirements for stability and heat clearance. Keep cooking equipment away from the bike and luggage. The cooking and food choices should determine the workspace, because a kettle and a frying pan need different amounts of room.
Rain cover is more work than a chair
A tarp can make a wet afternoon tolerable by giving you somewhere outside the tent to take off riding layers. It also means guy lines, anchors, and a wet sheet to pack in the morning. Include any support poles in the decision. A motorcycle trip does not automatically come with trekking poles, and a treeless campsite will expose that omission.
Think through the actual pitch before carrying one. How much usable space remains once the edges slope down? Where will the runoff land? Can you get between the tent and the bike without stepping over a line? Set it up once with the equipment you will bring, not a convenient garden fence doing half the work.
Use existing durable camping space rather than spreading the pitch into plants to accommodate more cover. Leave No Trace recommends choosing a site large enough for the whole camp without extending its worn edges. Its campsite guidance explains this gradual expansion.
A tarp deserves space on a trip with long stops in expected rain or sun. For a one-night stop, arriving early enough to use it may be the less certain part of the plan. Keep basic weather protection in the shelter and sleep kit; optional cover can stay packed when the site or wind makes it impractical.
Enough light for your own patch of camp
A headlamp already handles most hands-on work. A lantern adds shared light, which is useful when two people are eating or sorting the next day's route. Try the lowest setting and check where you can hang or place it. Bright light at eye level makes it harder to have a conversation across the table.
Check how the lantern charges against the electronics you already carry. Another cable is a small addition; remembering another battery before every trip is the recurring cost. Aim light at the work area and turn it off when you finish. Keep the beam out of neighboring tents.
A few repair supplies can live with this kit if they serve specific equipment. Bring the tape suited to a likely fabric repair and spare cord that fits the tarp hardware. Try the repair at home on spare material where possible. A bulky roll of tape and mystery cord are easy to pack indefinitely without knowing what they will fix.
After the first outing, leave the comfort gear aside while unpacking. Notice what stayed in its bag and why. Keep the chair you used every evening. Leave the table at home if you never bothered to assemble it.