One of the things that helps mine the most... is always carry my pillow!!! whether I am RVing or staying in a classy hotel. The other is being sure I wash my hair at night after I come in, if there is anything in the air.. which means most all spring and fall. once I learned that pollens stick to your hair better than anything, so wash it off before bed, so it doesn't get on your pillow and then ground into your nose overnight..
oh yeah, regular doses of zyrtec and using the neti bottle (I prefer bottle over pot) in a hot shower every morning also help manage my symptoms.
I just go in the RV and live with my allergies just like I do at home. After at least 50 years of living with allergic rhinitis and resulting sinusitis, I refuse to let my allergies run my life.