Emergency serptine belt installation? 99 caravan

Is there an emergency serpentine belt installation -- 99 caravan 3.3? My belt came off the other day, I thought a stick (limb) caused it to happen (it was pouring rain and I had driven through a few inches of water,
at an intersection low spot), P/S pully had a chunk out of it (fixed w/ help from this NG ,THX) . When I googled serpentine belt install there were many hits of the "belt off from water" type hits. Didn't know about this... This got me to thinking -- what if this happens out the other side Clayton (1/2 to the beach) w/ wife and two youngins. 1) Besides 15mm wrench and cheata pipe and a belt, what else should I have in the van? Is there a better tool? 2) Is there a way to put the belt on most of the pullys and bump the starter ? (yes, w/o fingers on the belt ;-) 2b) Could the spare belt be over-sized to aid installation in the middle of nowhere to get back to the world?
I read somewhere that a GM part would fix the belt coming off, a wider tensioner pulley ( I think). I had to replace the tensioner not long ago, and the repacement was from the zone. I think it is wider than the OEM , I saw somewhere the belt was to be 2mm from edge, mine is a few (5?) mm plenty of meat on either side of the belt on the pulley. Also, there is no way I can move the tensionor w/ just a wrench much less far enough to get the belt on w/ the other hand ( I am a 200 lb farmboy) should it be that hard? I can move it to position but can't hold it... Thanks for the info --
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More then likely the belt tensioner is worn out and causing the belt to ride at an angle to the P/S pump, the water hitting it made the belt slide off. Replace the belt and tensioner together Glenn Beasley Chrysler tech
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I replaced the belt tensioner a few mounths ago, it broke first start of the day (at home it's not like being stranded). This time I know I ran over something. and it was wet. I have had the van less than a year and have put on twice, unplaned I might add. Also I have not had the belt come off from water before.

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