Days per year: It varies usually between about 100 and 160 on average and is spread out over our 2-3 RV's we always own. Different season or trip, different RV is used as no one type RV is the best for all usages, needs or wants!
Weekends: Perhaps, an average of 3-4 just for the weekend as we are long retired and tend to always use weekdays more thus leaving more sites on weekends open for the still working people. Especially on holiday weekends as we already live in the finest area anyway and where so many thousands of RV'ers come to on holidays, weekends, and summers. So why leave home for less?
Longest outings: 74 to 80 days as that's with the 5th wheel at our Florida place in January till before April or RV'ing very long trips like to Alaska etc.
52 years so far of RV'ing and so many places to RV explore but so little time!