Soft ground after November 2026 rains: will the service truck sink?

The truck won't sink if it stays on the driveway, and from what you describe it already does. The only thing crossing the mud is the hose, and a 20 foot hose run is nothing for a vacuum truck driver. The real risk is the driver slipping or tracking mud into the unit, not the truck getting stuck.

What I do on our sites when the yard turns to soup:

• Lay a couple of plywood sheets or a few pallets as a walkway from the driveway edge to the door. Costs you almost nothing and the driver will thank you.
• Don't drag the standard unit yourself when it's full. Tipping a loaded unit in mud is a mess you don't want.
• If you want it closer, call the rental office and ask them to reposition it on the next service visit. They usually do it right after pumping when it's empty.
• Keep the driveway clear on service day so the truck has a hard surface to park on.

On charges for a stuck truck, that comes down to your rental agreement, so read the site access section. Most of them put the burden on the customer to provide a reachable spot, which you already have.