Yes, shave your legs! Also clip your toenails! I always forget that part and my rheum. always spends a lot of time on my feet because they are inflamed while I look at the ceiling trying to pretend that I'm not embarrassed about it! Expect to be sore after the appt because at least my doc always manipulates just about every joint in my body to note the level of inflammation.
Expect to give a lot of blood. Because there are no definitive tests for these types of diseases, there is a lot of overlap and a good rheum should check for other auto immune problems like Sjorgren's, etc, etc.
That's all I can think of right now and my daughter is crawling all over me. I will post again later if I think of anything else important.