I haven't done an analysis, but that price doesn't sound terrible.
Personally, I wouldn't pay extra for "no expiration" on the tix if you're planning on using all 7 days on the tickets during this one trip. If, for some reason, you end up not using a day, you can always take the tix to Guest Services before you leave and add the "no expiration", so I would call back and get the tickets changed to 7 day MYW with Park Hopping and expiry.
Also, is there a reason you are going to
MVMCP for two nights? If I were you, I would go to MVMCP only one night and get the Candlelight Processional Dinner Package one night. (Actually, since we will be at WDW at that same time with young kids, we have opted to do only the CP Dinner Package with the 5:30 CP show -- MVMCP would be too late for our kids.) CP Dinner Package isn't available yet, but you should be able to book it in August or September.
Also, with the dining plan, you'll want to make dining reservations for as many of your sit-down meals as possible. The dining plan is making the sit-down restaurants more popular and so it's getting more difficult to just walk-in for a meal at WDW. Call 407-WDW-DINE starting 90 days before your meal to book ADRs (reservations).
Wilderness Lodge is beautiful!
Enjoy your trip!