List of things for the Archery Hunter with bad hips and knees to make his experience more comfortable?

My dad is a archery hunter who has knee and hip probs. What things can I get him to make his hunting less painful. Like he most comfortable seats, ground blinds, support or comfort accessories?
Answer: 
Sorry for the delay in responding to your question. This is a tough question. Probably the best source of helpful information on the things you mentioned would be a sporting good store.
Answered on: 
Monday, October 28, 2013 - 4:47 PM MDT