You might. The weather feels like early fall, not mid-winter. A few weeks from now might be the start of mosquito season or it might be a blizzard.
As for mosquito repellant, I've always used Repel 100. It's a small spray bottle that easily fits in a pocket. A couple of squirts keeps the biters away much longer than ANY of the OFF products. I used this while canoeing in the Atchaffalaya Basin in Louisiana. Those mosquitoes ignore Deep Woods OFF, but I rarely got bit using Repel 100. Also, it doesn't irritate the skin or leave that sticky residue.
And a $3 bottle will last you about 30-40 trips. I use about 1 bottle every 3-4 years.