You can set up your pitch type to be priced per person or per pitch, so there's no problem with the price (in the manager portal, visit the 'Pitch types & extras' tab in the Portal and choose 'Add pitch type').
However, the allocations work on a pitch basis, so you will need to assign a quantity of 'pitches' (even if they don't exist at your site), for us to offer customers to book. At present, our users can only book one pitch at a time.
You may wish to use the pitch type 'Description' box to explain that you don't have formal pitches and that groups should just all book onto one pitch.