Portable vs On Board Air Compressor?

i have the viair constant duty onboard air system.it'll do all you're asking.some of the posts on this subject are really misinformed or just plain wrong.if you don't know,don't post your opinion,it;s not helpful. your worn out old,outdated piece of junk may not blow up a kiddie balloon,but the newer units do a good job.the're sold with tanks and all the valves,switches and fittings for a reason. i air down my tires and airbags when i drop the camper in a campsite to go exploring or to fish a close by lake all the time.and i also adjust my airbags,and no,they don't leak.sheesh.