My experience was exactly what Joann described. I was there last May, and the lovebugs were really an annoyance at the resort and especially around the pool where they dive bombed you, crawled on you and your stuff, and drowned themselves in your soft drink. In the parks however, I only had issues with them once, in line for the Dumbo ride at MK. Otherwise, at the parks they were non-existent.
Hopefully they won't be an issue for you.