Stop along the way and throw it into a laundromat dryer on low, checking it periodically so that you don't fry it. If your tent is wet, there are probably other things that are wet as well. I just pack it up wet into its waterproof stuff sack until I find a dryer. Or until the sun comes out and I find somewhere to dry it out while I make a cup of coffee or eat lunch. I generally won't set up camp if it is raining or threatening to rain. That would be my cheap motel or cabin night if I am still close to civilization. If not, I just make do. I have slept under the picnic pavilions in campgrounds as well even though one is not supposed too. If its raining, no one is usually heartless enough to kick you out, especially if you keep a low profile.