We fulltime and get a lot of value from 1000 Trails. Big thing is they have parks in places we want to be. Last year, we spent 247 days in TT parks. So far this year, we've used or are reserved at 165 days. If it matters where you go and if you need to be there, make the reservations. It doesn't cost anything and you can always change them. We have an "Elite" membership - 120day reservation window at most parks, stay up to 21 days, no time out. Our dues are frozen at $555 a year (or about $1.52 a day).
We've noticed a BIG change in RV park access the last two years - lots more RVs on the road, not any more RV sites being built. Right now, we're at 1000 Trails Palm Springs, and the place is 2/3 empty - but the temps are also around 100 degrees. We'll move to cooler this week. :)
al