Congrats on the upcoming wedding and on your Pivot! I eloped in a $40 dress from Target, so my tan (it was February) and bruises weren't a big concern. But if I were in your shoes, spring for a light spray tan if I was worried about tan lines. It takes me longer than a few weeks to loose my tan lines anyway. I'd also continue to ride and just stick to relatively easy trails. Or put some slicks on and ride on the road.