i've got quite a few bits and bobs under the seat! - jump leads (bikes only), allen key set, cable ties, pvc tape, disc lock, torch -all handy
i'm just thinking its sods law that the battery'll go flat or summat when its all loaded up and it'll all have to come off to get the seat off, although i guess it;s just a couple o' bolts, just keep the spanners on the bike!