Orvieto to Civita Di Bagnoregio By Bus

Hi,may i find out if there are any bus or public transport services from Orvieto to Civita Di Bagnoregio in late November-December period? Once there we are thinking of staying overnight at Civita Di Bagnoregio. We (3 adults) would have one or two 24 inch luggages. Would it be difficult to get the luggages to and across the bridge to Civita Di Bagnoregio? Any advice greatly appreciated. Thank you.