Hmm 4 days, well how about doing a wash and go with Eco Styler (or other extreme hard hold gel). Thr first day let it be crunchy then pineapple at night which should get the crunchiness out and repeat for the next 2 days. You can throw it into a high ponytail or bun if it gets out of hand.
I just started using Eco Styler like this and can finally get good 2nd and 3rd day hair. I actually like day 2 & 3 better than 1. Eco Styler also has UV protection. It does have glycerin so it maybe not be the best choice if you're gonna be in the desert or super humid area.
You can also use regular water to spritz and re wet your hair to re activate your gel.