Hi midwest - Great job re-framing the mall trip to meet your walking goals Personal goals are so powerful in helping us look for positives even in situations that we are not completely happy about.
A 180 with entertaining family seems perfect - it will surprise everybody, including yourself, I reckon. I used to have the same issue with hosting duties - that I needed to do everything. Since dbing, I've found that if I can focus on the main event, everyone (including me) having a good time being with each other, the rest will be fine. I'm also less proud now about asking for help.
Anniversaries are difficult - I feel sad too that you will be going through this, and with people around, who themselves will trigger different memories. It may be good to plan activities that will keep everyone distracted, busy so there isn't a lot of time for remembering.