I used these, available from various sources.  They make the task less odious.
Lisle 80290 Double Offset Hose Remover | Tool Discounter

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Lisle 80290 Double Offset Hose Remover | Tool Discounter

Double Offset Hose Remover. Shop Lisle Double Offset Hose Remover at Tool Discounter
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...and...
Hose Clamp Pliers Swivel Flat Band Flat-Band Ring-Type Car Water Pipe Removal Tool Mechanics Engineer - Walmart.com

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Hose Clamp Pliers Swivel Flat Band Flat-Band Ring-Type Car Water Pipe Re...

Free 2-day shipping. Buy Hose Clamp Pliers Swivel Flat Band Flat-Band Ring-Type Car Water Pipe Removal Tool Mech...
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If I'd been thinking clearly I'd have sprung for one of these remote operating ones also.  Regret hits hard once you're back under the van.
Performance Tool Hose Pliers - Allows remote access from a distance away W80656: Advance Auto Parts

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Performance Tool Hose Pliers - Allows remote access from a distance away...

Save on Performance Tool Hose Pliers - Allows remote access from a distance away W80656 at Advance Auto Parts. B...
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Stephen