Lots of good advice here. I have both side cases and top case on the GS so I tend to over pack a bit, but I'm rarely in want of anything.
- Water - Nuff said about this. Helps you stay hydrated, cleanse wounds, maybe top off coolant tank if you spring a small leak.
- Snacks ... Your health issues if any may dictate this one, but some beef jerky, crackers and so forth are handy to have.
- Small first aid kit. Just basic bandaids and some oitment... Nothing too major.
- Spare parts - You decide. I carry an array of fuses, relays, a coolant bottle and cap( you all know why), some light bulbs.
- Tools -I carry a small tool set specifically with just the tools I need for the spyder.
- FLASHLIGHT and Headlamp Flash light. I think these two items are uber important.
- Bright safety vest. - A lot of you wear black leather... If you are broken down on the side of the road, visibility is a good thing- especially at night.
- Clothing - Even for my long trips, I only pack the pair of pants I am wearing and one clean pair. You can wear each a few days before they get funked up enough. Enough t-shirts to get me through four or five days, one fleece or sweat shirt and maybe an over shirt. Depends on time of year of course. Enough under garments for 5 or 6 days... I tend to pack extra socks in case my feet get wet... and a pair of sneakers. The sneakers are a tough call as they take up space but are more comfy than the riding boots when not riding. A hat. Gloves, one for wearing and one for spare... one pair for cold if it is that time of year.
- 1 quart of oil for the Spyder. I use Amsoil, not always on the shelf at a dealer. I might use 1/2 quart of it in a 4k mile trip - I'm looking for a smaller oil compatible container.
-Spare batteries if needed
- laptop/ipad/camera - your choice. Whatever gets you by and saves space. They make plenty of universal chargers that can charge all your devices without the need to carry multiple chargers. You can buy laptop chargers that also charge your devices while powering your laptop, or use your laptop to charge the device.
- Rain gear
-Toiletries. Keep in mind you can restock while on the road so you don't need to bring large size deoderants and so forth.
- Spare pair of eye glasses. This can be huge if you break your usual pair while on the road - ON that note... bring your eyeglass prescription from your eye doctor so you can get a pair readily made.
- Gas... I have yet to ever need to carry any and I've covered some serious ground on the spyder. Only once did I get lost and get down to only 20 miles or so range before I found gas. GPS will help you with that. I generally try not to push the limits of the tank, and if I'm not sure of what is ahead or if I know I'm going to be remote, I will top off early... Keeping in mind that at 75 MPH I am getting 8 MPG less than at 45MPH. THey make some small quart sized metal gas containers but they need to be stored upright or they leak... I've often thought one of those would be good insurance, but again - haven't needed it at all. I know the folks out in Utah have some serious remote runs with no gas for miles and miles and they have to carry extra to get to the next station.
-Leave space. Not sure this was mentioned yet. For two reasons. 1. You might buy something along the way... Tshirts, whatever. 2. When digging in and out of your bags you may not always have time to pack stuff back in the way you started if you are hurrying to get rain gear on or riding with a group.
Pack intelligently. Put what you are going to leave in the bike at night in the bottom of the trunk, or pack what is more commonly accessed while on the road in a specific bag or location... ie; raingear is a good example of what to have readily available.
Take your first trip... Meet other owners and ask to look at their arrangements.