Spoken as the only (As far as I know) RV owner based at KMCN (the Class D at the middle of that TRSA) I would suggest that you not bother with the TRSA. MOST of the KMCN controllers are hard to get along with, unhelpful and generally disagreeable.
The only thing to watch out for is traffic out of RAFB (KWRB) but it's usually just E-8's or KC-135's flying bomber patterns at 2k. There is survelance radar at KWRB and KMCN, so military traffic would be routed around you, if you do somehow manage get in the way. The USAF guys don't fly much on the weekends, and there's more traffic at KPXE 20 miles South in Perry than out of KMCN.
Edit: Upon more thought, I guess participation in the TRSA involves talking to ATL approach, not MCN tower (since there is no such thing as MCN approach or WRB approach) so that might be a little better, but it's still probably not worth messing with unless you're already on Flight Following. A good bit of (the VERY little) traffic at MCN is big jet maintenance traffic, so I guess those guys dropping out of 18K ft at 300 kt is the other reason for the TRSA.