Rachael's solution for combining yardwork + crawling baby:
I needed a shady, safe area to have my baby in the yard so I could get some weeding done. My husband suggested a beach umbrella, but I didn't like the idea of letting my little one crawl all over, so I was looking at baby tents. Then I was thinking, rather than spending money, if I could only rig a canopy up for my Graco Pack n Play, I'd be set. So, I found a blanket and took the clips off of the Pack n Play side basket and used the clips to attach a "canopy" out of the blanket. Works great! I check on her often to make sure the airflow is good and that she's happy and hydrated.
Another option many Parenthackers have recommended: the KidCo PeaPod travel bed (see the related hack). I mean just LOOK how happy and relaxed that couple looks while picnicking on their lovely lawn.