Have a crack at it,
It is risk free as far as there is no anatomical structures of significance in the path,
You can slide under the iliofemoral ligament and get a nice intra-articular location.
Also you will get a great visualisation of the needle as it is a flat approach.
Remember to heel and toe the transducer with more pressure on the medial end of the transducer to increase your needle visualisation.
Let me know how you go,
Steve.