No need to remove the radiator. Just the top hose has to come loose to allow the shroud (and fan) to come out. The fan clutch has to be removed in any case, and it's easiest to remove with the water pump still bolted in.
The last water pump I did was on the side of the road for a buddy who had an issue on the way to Valdez. He was an hour up the road and had me pick up parts for him on the way. We had to tow him about a mile to a wide spot and had him back on the road 3 hours after I arrived with the needed parts and tools. He had me pick up a radiator just in case, but we left his original in place.
