I'm with robert on this one. Our farm is in the uplands of north Cumbria, includes moss (peat bog) and hectares of reshy ground... Until 2 years ago, BH had only ever had 2WD tractors.
I'd say 2WD would be fine on your spot, Rosemary. 56bhp isn't a great deal of power these days, but unless you want to sling girt heavy wet bales of silage about you should be ok.
Lucky you, it sounds like a good machine, and you can give it a thorough test drive too.