A few comments -
1) the Duck Lake road is quite a bit quicker in the summer when the traffic is higher.
2) the east side has far less amenities than the west side (as others have mentioned).
3) the east side will be cooler, smokier (if there are fires) and have more wind.
Can you give us a few more details about what you want to do and some other info (do you have kids, like to golf, hike etc)? We spend about 5 weeks down there every summer (on the west side) and have a pretty good idea as to what there is to do in the area.
Thanks