I have had a Grace frame that I used with my short arm machine for several years and did queen size through baby size quilts on it. Yes, there is a lot of rolling since you can only stitch approx. 4" per row. I upgraded to a larger machine - not a long arm - and now have approx. 11" of space. You have to plan out your design like QuiltnNan said so you can do larger designs. I mostly do free hand meander and/or swirls and loops. But I enjoy it and it makes me happy.
Tips? I don't have anything particular to say except enjoy it. When it becomes a chore, it's not fun anymore.