well, since all of our rigs are the Van type, we can;t really pack-rat too much because theres not much space to begin with. I do agree with the person that said sometimes actually getting back to home-base to restock is harder than it sounds. Usually, the way we work it is we will stock up the rig at the beginning of our shift with enough stuff to handle whatever we may come across in the next 12 hours. If the crew on the rig before us is nice, they will say "hey I used 4 NRMs, 3 bags of sailene, a few 4x4s, and a backboard, collar, and a set of block. you're M tank is good and you will need a D tank on the stretcher soon though but the spare is good" so basically this avoids us having to go through the WHOLE ambulance.
In response to the suction thing, we have the re-chargable portable units on the rig. do I use it? well, I used it on a code ONCE and the only reason I think it even made it into the house was because one of the firemen needed something to do lol. could I have lived without it? yeah....
Stuff I have leaned away from carrying on my person:
-seatbelt cutter/o2 wrench combo thing (when i worked at my previous job i used the O2 wrench part quite often, the enw place supplies them on every set of rig keys so i dont need it)
-small EMS field guide (i keep it in the rig...not gonna be on scene long enough to need to look something up)
-Tape hanging of the little straps on the pants pocket
Stuff we have on the rig I don;t think we need:
-tin foil. there is an industrial sized box of tin foil on every rig. please, find me something to do with it other than make funky looking martain helemts to put on my partner while he's asleep.
8 boxes of 4-pack monitor electrodes. this is in addition to the 5 or 6 packs we have in the monitor.
-the pulse-ox thing thats about the size of a small laptop computer.
-and finally the most useless thing that we carry on the rig IMO: the Zoll Autopulse