The wedding hotel. Stay in one of 46 guestrooms featuring plasma televisions. Complimentary wired and wireless internet access keeps you connected and digital programming provides entertainment. Private bathrooms with shower/tub combinations feature designer toiletries and hair dryers.
Booking should now be available on their website for the night of the wedding (and day before if needed) but if not yet available online they can be booked by calling directly to the hotel reception.
https://www.bestwestern.co.uk/hotels/best-western-plus-mosborough-hall-hotel-83732
For a closer but still affordable hotel room the IBIS in Barlborough is a 10-12 minute taxi ride from the wedding venue, with close access to the motorway for getting home or to your onward travel if taking the opportunity to explore more of the north while you are here.
We've also stayed in this hotel and it was fairly average for an IBIS room, we didn't have any complaints and there are nearby facilities for coffee and breakfast. Best to book in early for this one if staying here because prices will go up as the rooms fill.
If you would like a cheaper, very stripped back but still comfortable option within a 20 minute taxi ride from the wedding venue, then the Days Inn is a good choice. We've stayed at the Days Inn a couple of times and found the rooms to be comfortable for a motel style location with the added benefit of being within walking distance of a motorway services that has a fast food breakfast stand.
One of the local taxi companies - please make sure you book in advance because it can be difficult to get late taxis in the area due to weekend party goers in Sheffield.
One of the larger local taxi companies in Sheffield - pre-booking definitely advised due to weekend party goers and school holidays but local rates are normally fairly good compared to the South.
If you want the option of a group taxi back to a nearby hotel or hotels then Alcom Travel offer minibus services - please make sure you book in advance because it can be difficult to get late taxis in the area due to weekend party goers in Sheffield.
Alternative option for larger group bookings - I haven't enquired for costs so unsure how much this may be.