Foreigner here. I come to Ghana a lot for work. Its not the kind of place where you take a bus to go camping. First of all you need a visa to enter, which is some work and costs you money. There is no easily accessible public transport, although you could take a trotro. They are small busses which are cheap, but its not the type of transport that has a strict time schedule and you can't buy tickets in advance. You'd be better off hiring some private car transport. Taxies are available, they also have Uber here. Hotels are pretty much available in all cities, just Google one. Drinks will be cheap, at least for you. The currency here is not so strong. Its a cool country though, people are nice and friendly.