Leveling Blocks

I made my own out of pressure treated 2x6.

Cut to length. Run one edge through a table saw so that it is reasonably square to the face. Use a speed square an make 2 or 3 lines across one board. Us the lines as guide and drill a 1/2" hole about half way across the board. Apply construction adhesive and 4" long screws to connect the two edge faces. Make sure the growth rings are going in opposite directions. By making your 2x12 this way, it is a lot less likely to crack !

You can do the same with PT 2x4 but you will need 3 pieces. I have found that they might seem heavy at first, but leave them exposed to the weather and they will be a lot lighter the next year.

I think that 'rocking' leveler is for trailers. You need to support both dual wheels not just one on each side.

I started to carry a double set of wood blocks 2x8's as a back up for my hydraulic levelers.
However, since i installed two bubble levels inside my cab with a view of both from my drivers seat, I can usually make it level without using anything.
Just park the rv on a known level spot, then install one level onto the dash offering R-L and the other level I mounted above the passenger seat offering Front-Rear leveling. Most of time I just need to move a couple of feet to make it level.
Being on the 450 chassis makes it heavy enough to limit rocking when walking around inside. I hardly ever use the jacks for stability. I exercise the jacks periodically to make sure they still work.

I tried the Lego type blocks but found that they broke to easy and were a pain to setup when you don't get it right the first time and had to drive off,re-stack, and make them higher,to labor intensive.

When I bought my RV,a Former Rental, it came with Tri Level Ramps They don't break and if they are good enough to withstand the use in that market they must be good,they still put them in their rentals

I have used them a lot in the last 11 years and have had no problems and they are easy to use and store. I have 6 just in case but never have used them all,4 is the most I have ever needed,most times just 2 if at all,they were for the rear duallys.

I found that The Tri leveler work very well.

I would just use some scrap 2x6 or 2x8 boards about 18" long and use those..

I was setup and a new neighbor was setting up behind us. I heard this crunching and breaking sounds. I looked over and he was using those "Lego" type of stacking blocks and they were just crunching due to the weight of his Class C.

I had a couple of extra boards and offered him one. That's all he needed. I was leaving the morning, so I just said, keep it, as I'll be leaving in the morning, but no worries.. I got more at home. :)

Anyway, I've been using the same set for almost 20 years and still working great.

That's just what works for me. I don't need them for leveling that much, but use them for the stabilizer jacks (I have a TT) but when I do need them under the tires, they work great!

Good luck! Mitch